code: public Observable<OperationStatus> deleteExplicitListItemAsync(UUID appId, String versionId, UUID entityId, long itemId) {
          return deleteExplicitListItemWithServiceResponseAsync(appId, versionId, entityId, itemId).map(new Func1<ServiceResponse<OperationStatus>, OperationStatus>() {
              @Override
              public OperationStatus call(ServiceResponse<OperationStatus> response) {
                  return response.body();
              }
          });
      }
docs: Delete the explicit list item from the Pattern.any explicit list.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param entityId The pattern.any entity id.
  @param itemId The explicit list item which will be deleted.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the OperationStatus object