docs: public ApiResponse<Void> putCharactersCharacterIdMailMailIdWithHttpInfo(Integer characterId, Integer mailId,
              String datasource, String token, MailMetaData mailMetaData) throws ApiException {
          com.squareup.okhttp.Call call = putCharactersCharacterIdMailMailIdValidateBeforeCall(characterId, mailId,
                  datasource, token, mailMetaData, null);
          return apiClient.execute(call);
      }