code: public ApiResponse<String> getPingWithHttpInfo() throws ApiException {
          com.squareup.okhttp.Call call = getPingValidateBeforeCall(null);
          Type localVarReturnType = new TypeToken<String>() {
          }.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Ping route Ping the ESI routers
  
  @return ApiResponse&lt;String&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body