code: function(commandId, type, binding, bindingOnly) {
  			this._pendingBindings[commandId] = this._pendingBindings[commandId] || [];
  			this._pendingBindings[commandId].push({
  				type: type,
  				binding: binding,
  				bindingOnly: bindingOnly
  			});
  		}
docs: Remembers a key or url binding that has not yet been resolved to a command.
  @param {String} type One of <code>"key"</code>, <code>"url"</code>.