code: public OperationStatus deleteRegexEntityModel(UUID appId, String versionId, UUID regexEntityId) {
          return deleteRegexEntityModelWithServiceResponseAsync(appId, versionId, regexEntityId).toBlocking().single().body();
      }
docs: Deletes a regex entity model from the application.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param regexEntityId The regex entity extractor ID.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws ErrorResponseException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the OperationStatus object if successful.