code: function makeMove(child, afterNode, toIndex) {
  	  // NOTE: Null values reduce hidden classes.
  	  return {
  	    type: ReactMultiChildUpdateTypes.MOVE_EXISTING,
  	    content: null,
  	    fromIndex: child._mountIndex,
  	    fromNode: ReactReconciler.getHostNode(child),
  	    toIndex: toIndex,
  	    afterNode: afterNode
  	  };
  	}
docs: Make an update for moving an existing element to another index.
  
  @param {number} fromIndex Source index of the existing element.
  @param {number} toIndex Destination index of the element.
  @private