p.
  <span class="location-badge">exported from <a href="/angular2/pipes">angular2/pipes</a></span>
  defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/change_detection/pipes/pipe.js#L32">angular2/src/change_detection/pipes/pipe.js (line 32)</a>

:markdown
  An interface for extending the list of pipes known to Angular.
  
  If you are writing a custom [Pipe], you must extend this interface.
  
  #Example
  
  ```
  class DoublePipe extends Pipe {
   supports(obj) {
     return true;
   }
  
   transform(value) {
     return `${value}${value}`;
   }
  }
  ```
  
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