package foundation import "database/sql" type SampleMigrator struct{} func (sm *SampleMigrator) DB() *sql.DB { return nil } func (sm *SampleMigrator) DriverName() string { return "" } func (sm *SampleMigrator) Setup() error { return nil } func (sm *SampleMigrator) MigrateToStep(step int) error { return nil } func (sm *SampleMigrator) TearDown() error { return nil } var _ Migrator = &SampleMigrator{}