protected function bootstrapColumn($content, $match)
    {
        $parts = $this->getGridsystemColumMethodParts($match);

        $this->bootstrapGridsystemCol .= $this->class($this->getGridsytemColumnClass($parts))->div($content);

        $this->bootstrapGridsystemColumnCount += (int) $parts['number'];

        if( $this->bootstrapGridsystemColumnCount === 12 )
        {
            $this->bootstrapGridsystemRow .= $this->class('row')->div($this->bootstrapGridsystemCol ?: '');

            $this->bootstrapGridsystemCol = '';

            $this->bootstrapGridsystemColumnCount = 0;
        } 
    }