code: function( enabled ) {
  		var handlers, type,
  			method = enabled ? "enable" : "disable";
  
  		this._enabled = enabled;
  		for ( var i = 0; i < this.inputHandlers.length; i++ ) {
  			handlers = this.inputHandlers[ i ];
  			if ( handlers )  {
  				for ( type in handlers ) {
  					handlers[ type ][ method ]();
  				}
  			}
  		}
  	}
docs: Set enabled yes/no.
  Helper method for enable and disable.
  @param {boolean} enabled - If true enable, otherwise disable.