code: func SupportedDrivers() []string {
  	supportedDBs := make([]string, 0, len(drivers))
  	for _, drv := range drivers {
  		supportedDBs = append(supportedDBs, drv.DbType)
  	}
  	return supportedDBs
  }
docs: // SupportedDrivers returns a slice of strings that represent the database
  // drivers that have been registered and are therefore supported.