code: function (bind) {
                  if (!this.__isValidProcessingBind(bind)) {
                      return;
                  }
  
                  this.registerBinding(bind, this._notifyProcessingChange);
  
                  // save for later use and disposal
                  this._processing = {
                      inside : bind.inside,
                      to : bind.to
                  };
              }
docs: Add bindings to loading overlay and sections.
  @public
  @param {Object} bind
  
  <pre>
  {
  inside : ...
  to : ...
  }
  </pre>