title: extend a pipe like currency or number on a custom pipe on angular2
body: <p>I would like to call the numberPipe on my custom pipe I find this answer </p>
  
  <p><a href="https://stackoverflow.com/questions/35808272/angular2-use-basic-pipe-in-custom-pipe">Angular2 use basic pipe in custom pipe</a></p>
  
  <p>but I this solution don't work for me. I have an error 
  "The pipe 'bigInteger' could not be found"</p>
  
  <pre><code>import { Pipe, PipeTransform } from "@angular/core"
  import { CurrencyPipe  } from "@angular/common"
  
  @Pipe({
   name: "bigInteger"
   })
   export class BigInteger extends CurrencyPipe implements PipeTransform {
     transform(value: any): string {
      return value
   }
  }
  </code></pre>