title: How to downgrade custom pipe written with angular2 to be used in angular 1.5?
body: <p>I wrote component that is using a pipe in angular 2. Now I am trying to downgrade the component to be used in my angular 1.5:</p>
  
  <pre><code>angular.module('myApp')
      .directive('Item', downgradeComponent({component: ItemComponent, inputs: ['item'], outputs: ['onTagRemoved'] }) as angular.IDirectiveFactory);
  </code></pre>
  
  <p>The template of my <code>ItemComponent</code>is using a new pipe. While downgrade I get error message about that pipe.</p>
  
  <pre><code>systemjs.import error: Error: (SystemJS) Can't resolve all parameters for tagPipe: (?).
  </code></pre>
  
  <p>Do I need to downgrade the pipe to? How?
  Didn't find anything while search for pipes downgrade.</p>