You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: collection.go
    path of file: ./repos/db/adapter/sqlite
    
    the code of the file until where you have to start completion: // Copyright (c) 2012-present The upper.io/db authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// di
    
func (*collectionAdapter) Insert(col sqladapter.Collection, item interface{}) (interface{}, error) {
	columnNames, columnValues, err := sqlbuilder.Map(item, nil)
	if err != nil {
		return nil, err
	}

	pKey, err := col.PrimaryKeys()
	if err != nil {
		return nil, err
	}

	q := col.SQL().InsertInto(col.Name()).
		Columns(columnNames...).
		Values(columnValues...)

	var res sql.Result
	if res, err = q.Exec(); err != nil {
		return nil, err
	}

	if len(pKey) <= 1 {
		return res.LastInsertId()
	}

	keyMap := db.Cond{}

	for i := range columnNames {
		for j := 0; j < len(pKey); j++ {
			if pKey[j] == columnNames[i] {
				keyMap[pKey[j]] = columnValues[i]
			}
		}
	}

	return keyMap, nil
}