code: @NotNull
      @ObjectiveCName("createGroupWithTitle:withAvatar:withUids:")
      public Promise<Integer> createGroup(String title, String avatarDescriptor, int[] uids) {
          return modules.getGroupsModule().createGroup(title, avatarDescriptor, uids);
      }
docs: Create group
  
  @param title            group title
  @param avatarDescriptor descriptor of group avatar (can be null if not set)
  @param uids             member's ids
  @return Promise of group id