func (db *Database) C(name string) *Collection {
	return &Collection{db, name, db.Name + "." + name}
}
func (db *Database) C(name string) *Collection {
	return &Collection{db, name, db.Name + "." + name}
}
// C returns a value representing the named collection.
//
// Creating this value is a very lightweight operation, and
// involves no network communication.