code: public ApiResponse<Void> putCharactersCharacterIdCalendarEventIdWithHttpInfo(Integer characterId, Integer eventId,
              String datasource, String token, CharacterCalendarEvent characterCalendarEvent) throws ApiException {
          com.squareup.okhttp.Call call = putCharactersCharacterIdCalendarEventIdValidateBeforeCall(characterId, eventId,
                  datasource, token, characterCalendarEvent, null);
          return apiClient.execute(call);
      }
docs: Respond to an event Set your response status to an event --- SSO Scope:
  esi-calendar.respond_calendar_events.v1
  
  @param characterId
  An EVE character ID (required)
  @param eventId
  The ID of the event requested (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param token
  Access token to use if unable to set a header (optional)
  @param characterCalendarEvent
  (optional)
  @return ApiResponse&lt;Void&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body