docs: public com.squareup.okhttp.Call putCharactersCharacterIdCalendarEventIdAsync(Integer characterId, Integer eventId,
              String datasource, String token, CharacterCalendarEvent characterCalendarEvent,
              final ApiCallback<Void> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = putCharactersCharacterIdCalendarEventIdValidateBeforeCall(characterId, eventId,
                  datasource, token, characterCalendarEvent, callback);
          apiClient.executeAsync(call, callback);
          return call;
      }