code: public Observable<ExplicitListItem> getExplicitListItemAsync(UUID appId, String versionId, UUID entityId, long itemId) {
          return getExplicitListItemWithServiceResponseAsync(appId, versionId, entityId, itemId).map(new Func1<ServiceResponse<ExplicitListItem>, ExplicitListItem>() {
              @Override
              public ExplicitListItem call(ServiceResponse<ExplicitListItem> response) {
                  return response.body();
              }
          });
      }
docs: Get the explicit list of the pattern.any entity.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param entityId The Pattern.Any entity Id.
  @param itemId The explicit list item Id.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ExplicitListItem object