public function get($column)
    {
        foreach ($this->expressions as $expr) {
            if ($expr->getColumn() == $column) {
                return $expr;
            }
        }

        return null;
    }
public function get($column)
    {
        foreach ($this->expressions as $expr) {
            if ($expr->getColumn() == $column) {
                return $expr;
            }
        }

        return null;
    }
public function get ( $ column ) { foreach ( $ this -> expressions as $ expr ) { if ( $ expr -> getColumn ( ) == $ column ) { return $ expr ; } } return null ; }
Returns an expression by the column name or null

@param string $column
@return \PSX\Sql\Condition\ExpressionInterface
Returns an expression by the column name or null