code: public CharacterPortraitResponse getCharactersCharacterIdPortrait(Integer characterId, String datasource,
              String ifNoneMatch) throws ApiException {
          ApiResponse<CharacterPortraitResponse> resp = getCharactersCharacterIdPortraitWithHttpInfo(characterId,
                  datasource, ifNoneMatch);
          return resp.getData();
      }
docs: Get character portraits Get portrait urls for a character --- This route
  expires daily at 11:05
  
  @param characterId
  An EVE character ID (required)
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param ifNoneMatch
  ETag from a previous request. A 304 will be returned if this
  matches the current ETag (optional)
  @return CharacterPortraitResponse
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body