protected final function get_col_value( $col ) {
		if ( ! isset( $this->data[ $col ] ) ) {
			throw new \InvalidArgumentException( "Column does not exist." );
		}

		return $this->data[ $col ];
	}
protected final function get_col_value( $col ) {
		if ( ! isset( $this->data[ $col ] ) ) {
			throw new \InvalidArgumentException( "Column does not exist." );
		}

		return $this->data[ $col ];
	}
protected final function get_col_value ( $ col ) { if ( ! isset ( $ this -> data [ $ col ] ) ) { throw new \ InvalidArgumentException ( "Column does not exist." ) ; } return $ this -> data [ $ col ] ; }
Get the value of a column.

@since 1.0

@param string $col

@return mixed
Get the value of a column .