public function leftJoin($table, $firstColumn, $operator = null, $secondColumn = null) {
		return $this->join($table, $firstColumn, $operator, $secondColumn, 'left');
	}
public function leftJoin($table, $firstColumn, $operator = null, $secondColumn = null) {
		return $this->join($table, $firstColumn, $operator, $secondColumn, 'left');
	}
public function leftJoin ( $ table , $ firstColumn , $ operator = null , $ secondColumn = null ) { return $ this -> join ( $ table , $ firstColumn , $ operator , $ secondColumn , 'left' ) ; }
Add a left join to the query.

@param string $table
@param string $firstColumn
@param string $operator
@param string $secondColumn
@return \wiggum\db\Builder
Add a left join to the query .