docs: public com.squareup.okhttp.Call getPingAsync(final ApiCallback<String> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = getPingValidateBeforeCall(callback);
          Type localVarReturnType = new TypeToken<String>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }