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