code: public Observable<ServiceResponse<OperationStatus>> updateExplicitListItemWithServiceResponseAsync(UUID appId, String versionId, UUID entityId, long itemId, UpdateExplicitListItemOptionalParameter updateExplicitListItemOptionalParameter) {
          if (this.client.endpoint() == null) {
              throw new IllegalArgumentException("Parameter this.client.endpoint() is required and cannot be null.");
          }
          if (appId == null) {
              throw new IllegalArgumentException("Parameter appId is required and cannot be null.");
          }
          if (versionId == null) {
              throw new IllegalArgumentException("Parameter versionId is required and cannot be null.");
          }
          if (entityId == null) {
              throw new IllegalArgumentException("Parameter entityId is required and cannot be null.");
          }
          final String explicitListItem = updateExplicitListItemOptionalParameter != null ? updateExplicitListItemOptionalParameter.explicitListItem() : null;
  
          return updateExplicitListItemWithServiceResponseAsync(appId, versionId, entityId, itemId, explicitListItem);
      }
docs: Updates an explicit list item for a Pattern.Any entity.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param entityId The Pattern.Any entity extractor ID.
  @param itemId The explicit list item ID.
  @param updateExplicitListItemOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the OperationStatus object