     /**
      List models.
 
-     Lists available models for Relations and Entities features, including Watson Knowledge Studio custom models that you have created and linked to your Natural Language Understanding service.
+     Lists available models for Relations and Entities features, including Watson Knowledge Studio custom models that
+     you have created and linked to your Natural Language Understanding service.
 
      - parameter failure: A function executed if an error occurs.
      - parameter success: A function executed with the successful result.
-    */
+     */
     public func listModels(
         failure: ((Error) -> Void)? = nil,
         success: @escaping (ListModelsResults) -> Void)


     Deletes a custom model.

     - parameter modelID: modelID of the model to delete.
     - parameter failure: A function executed if an error occurs.
     - parameter success: A function executed with the successful result.
    */
    public func deleteModel(
        modelID: String,
        failure: ((Error) -> Void)? = nil,

     - parameter username: The username used to authenticate with the service.
     - parameter password: The password used to authenticate with the service.
     - parameter version: The release date of the version of the API to use. Specify the date
     in "YYYY-MM-DD" format.
     */
    public init(username: String, password: String, version: String) {
        self.credentials = .basicAuthentication(username: username, password: password)
