public void deleteGroupIdentityLink(String taskId, String groupId, String identityLinkType) {
commandExecutor.execute(new DeleteIdentityLinkCmd(taskId, null, groupId, identityLinkType));
}
public void deleteUserIdentityLink(String taskId, String userId, String identityLinkType) {
commandExecutor.execute(new DeleteIdentityLinkCmd(taskId, userId, null, identityLinkType));
}