src/mako/database/query/Query.php
public function isNull($column, string $separator = 'AND', bool $not = false)
	{
		$this->wheres[] =
		[
			'type'      => 'null',
			'column'    => $column,
			'separator' => $separator,
			'not'       => $not,
		];

		return $this;
	}
public function isNull($column, string $separator = 'AND', bool $not = false)
	{
		$this->wheres[] =
		[
			'type'      => 'null',
			'column'    => $column,
			'separator' => $separator,
			'not'       => $not,
		];

		return $this;
	}
public function isNull ( $ column , string $ separator = 'AND' , bool $ not = false ) { $ this -> wheres [ ] = [ 'type' => 'null' , 'column' => $ column , 'separator' => $ separator , 'not' => $ not , ] ; return $ this ; }
Adds a IS NULL clause.

@param  mixed  $column    Column name
@param  string $separator Clause separator
@param  bool   $not       Not in?
@return $this
Adds a IS NULL clause .