code: public static CredentialFetcher fetcher(final String pathAccountSid, 
                                              final String pathCredentialListSid, 
                                              final String pathSid) {
          return new CredentialFetcher(pathAccountSid, pathCredentialListSid, pathSid);
      }
docs: Create a CredentialFetcher to execute fetch.
  
  @param pathAccountSid The unique id of the Account that is responsible for
  this resource.
  @param pathCredentialListSid The unique id that identifies the credential
  list that contains the desired credential
  @param pathSid The unique id that identifies the resource to fetch.
  @return CredentialFetcher capable of executing the fetch