public function leftJoin(string $table, string $key, string $operator, string $value): SelectQueryBuilder
    {
        $this->addJoin($table, $key, $operator, $value, 'left');
        return $this;
    }
public function leftJoin(string $table, string $key, string $operator, string $value): SelectQueryBuilder
    {
        $this->addJoin($table, $key, $operator, $value, 'left');
        return $this;
    }
public function leftJoin ( string $ table , string $ key , string $ operator , string $ value ) : SelectQueryBuilder { $ this -> addJoin ( $ table , $ key , $ operator , $ value , 'left' ) ; return $ this ; }
Adds an "left join".

@param string $table
@param string $key
@param string $operator
@param string $value
@return SelectQueryBuilder
Adds an left join .