hunk.code_window:     this.size--;
       return true;
     }
     forEach(cb, thisArg) {
       for (let i = 0; i < this.size; i++) {
         cb.call(thisArg, this._values[i], this._keys[i]);
       }
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hunk.labels: keep keep keep keep replace keep keep keep keep keep
hunk.after_edit:   forEach(cb, thisArg): void {
  
hunk.file_path: src/util/MapPolyfill.ts
hunk.type: replace
file: <!DOCTYPE html>
  <html lang="en">
  <head>
  	<meta charset="UTF-8">
  	<title>RxJS Perf Tests</title>
  </head>
  <body>
  	<h2>Tests</h2>
  	<ul>
  		<li><a href="mergeMap">mergeMap</a></li>
      <li><a href="mergeMap-scalar">mergeMap-scalar</a></li>
  		<li><a href="groupBy">groupBy</a></li>
  		<li><a href="merge">merge</a></li>
  		<li><a href="zip">zip</a></li>
  	</ul>
  </body>
  </html>