code: public void updateGroup(long groupId, String name, boolean isPrivate) {
  		LinkedMultiValueMap<String, String> params = new LinkedMultiValueMap<String, String>();
  		params.set("name",name);
  		params.set("private", String.valueOf(isPrivate));
  		restTemplate.put(buildUri("groups/"+groupId), params);
  	}
docs: Method returns 401 from Yammer, so it isn't visible in GroupOperations yet
  @param groupId
  @param name
  @param isPrivate