### [2.1.2](https://github.com/power-assert-js/espower/releases/tag/v2.1.2) (2019-01-11)
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|
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#### Bug Fixes
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* [Skip modifying argument if SpreadElement appears immediately beneath assert](https://github.com/power-assert-js/espower/pull/42)
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|
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#### Refactor
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* [remove xtend](https://github.com/power-assert-js/espower/pull/40) (by [jimmywarting](https://github.com/jimmywarting))
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#### Chore
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* [Replace gulp with npm scripts](https://github.com/power-assert-js/espower/pull/41)
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### [2.1.1](https://github.com/power-assert-js/espower/releases/tag/v2.1.1) (2018-05-15)
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* Update default `ecmaVersion` to 2018 ([f315b49](https://github.com/power-assert-js/espower/commit/f315b49399200051f9ec47ad0c8877c2ff112463))
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## [2.1.0](https://github.com/power-assert-js/espower/releases/tag/v2.1.0) (2017-05-21)
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#### Features
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* [Add `ecmaVersion` and `sourceType` to options to support ES Modules syntax](https://github.com/power-assert-js/espower/pull/37)
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### [2.0.3](https://github.com/power-assert-js/espower/releases/tag/v2.0.3) (2017-02-19)
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#### Bug Fixes
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* [Store scopes in a stack to push/pop them in a consistent way](https://github.com/power-assert-js/espower/pull/36)
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### [2.0.2](https://github.com/power-assert-js/espower/releases/tag/v2.0.2) (2017-01-12)
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#### Bug Fixes
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* [Value recorder should clean up captured values at the end of assertion expression](https://github.com/power-assert-js/espower/pull/35)
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### [2.0.1](https://github.com/power-assert-js/espower/releases/tag/v2.0.1) (2016-11-16)
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#### Bug Fixes
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* [Dealing with assertion that also is a concise body of ArrowFunctionExpression](https://github.com/power-assert-js/espower/pull/34)
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## [2.0.0](https://github.com/power-assert-js/espower/releases/tag/v2.0.0) (2016-11-11)
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#### Features
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* [Embed value capturing helper into transpiled code](https://github.com/power-assert-js/espower/pull/26)
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* [Expose visitor object for estraverse](https://github.com/power-assert-js/espower/pull/31)
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* stop exposing Instrumentor and AssertionVisitor ([afa380f9](https://github.com/power-assert-js/espower/commit/afa380f949acf4366d9226c44d89cb7ccdfd72c5))
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* [Remove destructive option](https://github.com/power-assert-js/espower/pull/30)
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* [Drop support for prebuilt bundle, bower and Node v0.10](https://github.com/power-assert-js/espower/pull/32)
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|
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#### Breaking Changes
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* [Drop support for prebuilt bundle, bower and Node v0.10](https://github.com/power-assert-js/espower/pull/32)
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We stopped providing prebuilt bundle for browsers. Please build your own by using browserify, webpack and so on.
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We also dropped bower support. Please use npm instead.
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* Internal classes `espower.Instrumentor` and `espower.AssertionVisitor` are not exported any more.
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([afa380f9](https://github.com/power-assert-js/espower/commit/afa380f949acf4366d9226c44d89cb7ccdfd72c5))
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* [Remove destructive option](https://github.com/power-assert-js/espower/pull/30)
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The `destructive` option has been removed.
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New behavior is like `destructive: true`, means that passed AST is modified directly.
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If you do not want your AST to be modified directly, you should deep-clone your AST by yourself.
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### [1.3.2](https://github.com/power-assert-js/espower/releases/tag/v1.3.2) (2016-06-22)
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#### Bug Fixes
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* fix breaking changes introduced in 1.3.0 and 1.3.1
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### [1.3.1](https://github.com/power-assert-js/espower/releases/tag/v1.3.1) (2016-06-21)
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#### Bug Fixes
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* stop capturing SequenceExpression itself since SequenceExpressions are not enclosed in parentheses in some cases ([e8acbc61](https://github.com/power-assert-js/espower/commit/e8acbc61810454da05098baf6624b57d68deb3f9))
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## [1.3.0](https://github.com/power-assert-js/espower/releases/tag/v1.3.0) (2016-06-21)
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#### Features
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* [Support SequenceExpression (i.e., comma operator)](https://github.com/power-assert-js/espower/pull/27)
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### [1.2.1](https://github.com/power-assert-js/espower/releases/tag/v1.2.1) (2015-11-06)
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* [disambiguate between function calls and async/yield expressions](https://github.com/power-assert-js/espower/pull/23) (by [@jamestalmage](https://github.com/jamestalmage))
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## [1.2.0](https://github.com/power-assert-js/espower/releases/tag/v1.2.0) (2015-11-05)
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* [Instrument ES7 AwaitExpression Nodes](https://github.com/power-assert-js/espower/pull/21) (by [@jamestalmage](https://github.com/jamestalmage))
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## [1.1.0](https://github.com/power-assert-js/espower/releases/tag/v1.1.0) (2015-11-03)
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* [capture YieldExpressions](https://github.com/power-assert-js/espower/pull/20) (by [@jamestalmage](https://github.com/jamestalmage))
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* [make AssertionVisitor more overridable](https://github.com/power-assert-js/espower/pull/19)
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### [1.0.7](https://github.com/power-assert-js/espower/releases/tag/v1.0.7) (2015-09-21)
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* update escodegen to 1.7.0 ([feb96b0](https://github.com/power-assert-js/espower/commit/feb96b004acd0c540ab76a2529d91582b2095433))
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* update source-map to 0.5.0 ([7bc824b](https://github.com/power-assert-js/espower/commit/7bc824ba9d808be7d25959822acceb9e04422373))
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### [1.0.6](https://github.com/power-assert-js/espower/releases/tag/v1.0.6) (2015-06-07)
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* SourceMap's `sourceRoot` should have precedence over `options.sourceRoot` if `sourceRoot` is URL ([dcf9642d](https://github.com/power-assert-js/espower/commit/dcf9642de0becb8239d4c3a1b8366a980bddb585))
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### [1.0.5](https://github.com/power-assert-js/espower/releases/tag/v1.0.5) (2015-06-05)
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* update escallmatch to 1.4.2 and espurify to 1.3.0 ([62973ed](https://github.com/power-assert-js/espower/commit/62973ed7392037e46dedf9d8c5e02a2c28ed95c2))
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* use licensify to prepend license header ([d3bc5e8](https://github.com/power-assert-js/espower/commit/d3bc5e860126826b60ef3108add145c5c076e9bf))
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### [1.0.4](https://github.com/power-assert-js/espower/releases/tag/v1.0.4) (2015-06-04)
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* try to create relative path if sourceMap.sourceRoot is locating source files on on a server ([ec0a91ba](https://github.com/power-assert-js/espower/commit/ec0a91baac5f747bd49ca88ea963141485bdddde))
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* never show absolute path or URL in power-assert output ([252b043f](https://github.com/power-assert-js/espower/commit/252b043f32db00fbbd81b7a6eb98e9d85c5b9371))
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### [1.0.3](https://github.com/power-assert-js/espower/releases/tag/v1.0.3) (2015-05-31)
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* use basename when `sourceRoot` in `options.sourceMap` is locating source files on a server ([7822df1b](https://github.com/power-assert-js/espower/commit/7822df1b2097625231b2d70f71c5909851399f1d))
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### [1.0.2](https://github.com/power-assert-js/espower/releases/tag/v1.0.2) (2015-05-30)
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* use basename when incoming `options.path` is absolute and it conflicts with `options.sourceRoot` or `sourceRoot` in `options.sourceMap` ([02f7b35a](https://github.com/power-assert-js/espower/commit/02f7b35a5acad20994b745de32cf512c2b95f57a))
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### [1.0.1](https://github.com/power-assert-js/espower/releases/tag/v1.0.1) (2015-05-29)
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* apply `options.sourceRoot` if and only if incoming `options.path` is absolute ([65b4012a](https://github.com/power-assert-js/espower/commit/65b4012ab4ef71131fa5c4ea3090ab3f625e32d9))
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## [1.0.0](https://github.com/power-assert-js/espower/releases/tag/v1.0.0) (2015-05-25)
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#### Features
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* transfer to power-assert-js organization ([c3b79559](https://github.com/power-assert-js/espower/commit/c3b79559d1d5cd8ea6d66406b36749bbafe33637))
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* support `deepStrictEqual` and `notDeepStrictEqual` ([9d98bc17](https://github.com/power-assert-js/espower/commit/9d98bc178c0a21f41ff4888fba9c89139f8af195))
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* [`sourceRoot` option](https://github.com/power-assert-js/espower/pull/18). If set, filepath in power-assert output will be relative from `sourceRoot`
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* [`visitorKeys` option](https://github.com/power-assert-js/espower/pull/17) to customize AST traversal
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## [0.11.0](https://github.com/power-assert-js/espower/releases/tag/v0.11.0) (2015-04-18)
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#### Bug Fixes
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* throw Error if AST is already instrumented ([1d47bdc3](https://github.com/power-assert-js/espower/commit/1d47bdc3169de7865e176ceb708a07247ab17703))
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#### Features
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* [ES6 support](https://github.com/power-assert-js/espower/pull/16)
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## [0.10.0](https://github.com/power-assert-js/espower/releases/tag/v0.10.0) (2014-11-11)
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* **espower:**
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* update escodegen ([22b002e3](https://github.com/power-assert-js/espower/commit/22b002e3c8c99679f5b97ae104ed66d685a0ea59))
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* update estraverse ([ecb6c07d](https://github.com/power-assert-js/espower/commit/ecb6c07dec5fd3c9cbf2da4e82667d0077ef3909))
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* update espurify ([9a75c16f](https://github.com/power-assert-js/espower/commit/9a75c16ff91f952b26a373df4e96bdcc6e09cfd8))
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* update escallmatch ([dbf424b1](https://github.com/power-assert-js/espower/commit/dbf424b1d3236dd2ac9e4076aef1ecee3867e228))
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### 0.9.1 (2014-09-15)
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#### Bug Fixes
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|
* **espower:** decide to be skipped first, then enter node ([9d0a778a](https://github.com/power-assert-js/espower/commit/9d0a778a1ae97bb5c522cbfc7b1b65250118f2ea))
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## 0.9.0 (2014-08-21)
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#### Features
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|
* **espower:**
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* adjust filepath in power-assert output if sourceMap option is given ([f919d59d](https://github.com/power-assert-js/espower/commit/f919d59d6eea764881e0266f562724b7142f7695))
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* adjust line number in power-assert output if sourceMap option is given ([8c035d89](https://github.com/power-assert-js/espower/commit/8c035d89ae88c8554cb8ca0b6bd0f7d6fe2008b0))
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## 0.8.0 (2014-08-12)
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#### Features
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|
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* **espower:**
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* [built and modularized by browserify](https://github.com/power-assert-js/espower/pull/9)
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* [use escallmatch module to describe instrumentation target patterns](https://github.com/power-assert-js/espower/pull/10)
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* support chained callee like `browser.assert.element(selector)` ([ea0a3ce9](https://github.com/power-assert-js/espower/commit/ea0a3ce96f56034ab6735365184e1e397f6561c0))
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#### Breaking Changes
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* option `powerAssertVariableName` is now deprecated and ignored. Please use `patterns` option instead ([2f023f91](https://github.com/power-assert-js/espower/commit/2f023f91f3bbe8c6d9038e7237541112f2eaf143))
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* option `targetMethods` is now deprecated and ignored. Please use `patterns` option instead ([e75e5d35](https://github.com/power-assert-js/espower/commit/e75e5d35c33a7c128f14db224c5387520665b55e))
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If you already customize instrumentation pattern using `powerAssertVariableName` and `targetMethods`, you need to migarte. To migrate, change your code from the following:
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```javascript
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var options = {
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powerAssertVariableName: 'yourAssert',
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targetMethods: {
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oneArg: [
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'okay'
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],
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twoArgs: [
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'equal',
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'customEqual'
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]
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}
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};
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var modifiedAst = espower(jsAst, options);
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```
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To:
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```javascript
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var options = {
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patterns: [
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'yourAssert(value, [message])',
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'yourAssert.okay(value, [message])',
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'yourAssert.equal(actual, expected, [message])',
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'yourAssert.customEqual(actual, expected, [message])'
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]
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};
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var modifiedAst = espower(jsAst, options);
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```
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