code: public ApiResponse<List<CharacterCalendarResponse>> getCharactersCharacterIdCalendarWithHttpInfo(
              Integer characterId, String datasource, Integer fromEvent, String ifNoneMatch, String token)
              throws ApiException {
          com.squareup.okhttp.Call call = getCharactersCharacterIdCalendarValidateBeforeCall(characterId, datasource,
                  fromEvent, ifNoneMatch, token, null);
          Type localVarReturnType = new TypeToken<List<CharacterCalendarResponse>>() {
          }.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: List calendar event summaries Get 50 event summaries from the calendar.
  If no from_event ID is given, the resource will return the next 50
  chronological event summaries from now. If a from_event ID is specified,
  it will return the next 50 chronological event summaries from after that
  event --- This route is cached for up to 5 seconds SSO Scope:
  esi-calendar.read_calendar_events.v1
  
  @param characterId
  An EVE character ID (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param fromEvent
  The event ID to retrieve events from (optional)
  @param ifNoneMatch
  ETag from a previous request. A 304 will be returned if this
  matches the current ETag (optional)
  @param token
  Access token to use if unable to set a header (optional)
  @return ApiResponse&lt;List&lt;CharacterCalendarResponse&gt;&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body