public static Optional<String> extractOrganizationName(String groupName) {
    return extractRegexGroupIfMatches(groupName, 1);
  }
@Test
  public void extractOrganizationName_whenNameIsCorrect_extractsOrganizationName() {
    assertThat(GithubTeamConverter.extractOrganizationName("Org1/team1")).isEqualTo(Optional.of("Org1"));
    assertThat(GithubTeamConverter.extractOrganizationName("Org1/team1/team2")).isEqualTo(Optional.of("Org1"));
  }