code: public ApiResponse<List<AllianceContactsLabelsResponse>> getAlliancesAllianceIdContactsLabelsWithHttpInfo(
              Integer allianceId, String datasource, String ifNoneMatch, String token) throws ApiException {
          com.squareup.okhttp.Call call = getAlliancesAllianceIdContactsLabelsValidateBeforeCall(allianceId, datasource,
                  ifNoneMatch, token, null);
          Type localVarReturnType = new TypeToken<List<AllianceContactsLabelsResponse>>() {
          }.getType();
          return apiClient.execute(call, localVarReturnType);
      }
docs: Get alliance contact labels Return custom labels for an alliance&#39;s
  contacts --- This route is cached for up to 300 seconds SSO Scope:
  esi-alliances.read_contacts.v1
  
  @param allianceId
  An EVE alliance 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)
  @param token
  Access token to use if unable to set a header (optional)
  @return ApiResponse&lt;List&lt;AllianceContactsLabelsResponse&gt;&gt;
  @throws ApiException
  If fail to call the API, e.g. server error or cannot
  deserialize the response body