public function doAction( $action, $params = array() )
    {
        if ( isset( $this->actions[ $action ] ) )
        {
            foreach( $this->actions[ $action ] as $callback )
            {
                call_user_func_array( $callback[ 'callback' ], $params );

                if ( $this->debug )
                {
                    echo PHP_EOL . '->ACTION: ' . $action . ' -> '
                            . $this->_serializeCallback( $callback[ 'callback' ] )
                            . ' + Priority: ' . $callback[ 'priority' ]
                            . PHP_EOL;
                }
            }
        }
    }