func (db *NullDb) GetKeys(prefix string) ([]string, error) {
	return []string{}, nil
}
GetKeys returns a list of keys which have the specified key as a prefix.
package redux
type NullDb struct {
}
func NullDbOpen(ignored string) (DB, error) {
	return &NullDb{}, nil
}
func (db *NullDb) IsNull() bool { return true }
func (db *NullDb) Put(key string, value []byte) error {
	return nil
}
func (db *NullDb) Get(key string) ([]byte, bool, error) {
	return []byte{}, false, nil
}
func (db *NullDb) Delete(key string) error {
	return nil
}