old_contents: /*
    This module is intended to encapsulate all the known places where
    liquid-fire depends on non-public Ember APIs.
  
    See also tests/helpers/ember-testing-internals.js, which does the
    same thing but for code that is only needed in the test environment.
  
   */
  import Ember from 'ember';
  const { get, guidFor } = Ember;
  
  
  // These things are swapped out at build time based on the Ember
  // version.
  export {
    componentNodes
  } from './ember-internals/version-specific';
  
  export function keyForArray(keyPath) {
    switch (keyPath) {
      case '@index':
        return index;
      case '@identity':
      case undefined:
      case null:
        return identity;
      default:
        return (item) => get(item, keyPath);
    }
  }
  
  function index(item, index) {
    return String(index);
  }
  
  function identity(item) {
    switch (typeof item) {
      case 'string':
      case 'number':
        return String(item);
      default:
        return guidFor(item);
    }
  }
  
new_contents: /*
    This module is intended to encapsulate all the known places where
    ember-animated depends on non-public Ember APIs.
  
    See also tests/helpers/ember-testing-internals.js, which does the
    same thing but for code that is only needed in the test environment.
  
   */
  import Ember from 'ember';
  const { get, guidFor } = Ember;
  
  
  // These things are swapped out at build time based on the Ember
  // version.
  export {
    componentNodes
  } from './ember-internals/version-specific';
  
  export function keyForArray(keyPath) {
    switch (keyPath) {
      case '@index':
        return index;
      case '@identity':
      case undefined:
      case null:
        return identity;
      default:
        return (item) => get(item, keyPath);
    }
  }
  
  function index(item, index) {
    return String(index);
  }
  
  function identity(item) {
    switch (typeof item) {
      case 'string':
      case 'number':
        return String(item);
      default:
        return guidFor(item);
    }
  }
  
subject: fix comment