code: public ApiResponse<ApiSuccessResponse> completeWithHttpInfo(String mediatype, String id, CompleteData completeData) throws ApiException {
          com.squareup.okhttp.Call call = completeValidateBeforeCall(mediatype, id, completeData, null, null);
          Type localVarReturnType = new TypeToken<ApiSuccessResponse>(){}.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Complete an interaction
  Marks the specified interaction as complete.
  @param mediatype The media channel. (required)
  @param id The ID of the interaction to complete. (required)
  @param completeData Request parameters. (optional)
  @return ApiResponse&lt;ApiSuccessResponse&gt;
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body