private void assertCoordinatorTag(CommandResult commandResult) {
    List<String> ids = commandResult.getResultData()
        .getTableSection("members")
        .getValuesInColumn("Id");
    assertThat(ids.stream().filter(string -> pattern.matcher(string).matches())).hasSize(1);
  }
Assert that the locator-0 has been marked with the "Coordinator" tag.

@param commandResult GFSH command result to test.
geode-gfsh/src/distributedTest/java/org/apache/geode/management/internal/cli/commands/ListMembersCommandDUnitTest.java