# Interface ErrorCodeHandler<T>

public interface ErrorCodeHandler<T>
A generic error callback interface for an error code returned from the server

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `onError(Response<T> errorData)`
  An error callback can be invoked with a different type from the success callback

- ## Method Details

  - ### onError

    void onError(Response<T> errorData)

    An error callback can be invoked with a different type from the success callback

    ###### Parameters

    - `errorData`: the data matching the error.