code: func (ch *CredHub) GetNVersions(name string, numberOfVersions int) ([]credentials.Credential, error) {
  	creds, err := ch.getNVersionsOfCredential(name, numberOfVersions)
  	return creds, err
  }
docs: // GetNVersions returns the N most recent credential versions for a given credential name. The returned credentials will be encoded as a list of maps and may be of any type.