I cannot figure out how to create a new contact group and assign it to the contact using google people api in php. An error
"person.memberships is a read only field."
occurs at $person->setMemberships():
$contactGroup=new Google_Service_PeopleService_ContactGroup();
//$contactGroup->setGroupType('USER_CONTACT_GROUP');
$contactGroup->setName('Some group');
$contactGroup->create();
$cgm=new Google_Service_PeopleService_ContactGroupMembership();
$cgm->setContactGroupId('groupID');
$membership=new Google_Service_PeopleService_Membership();
$membership->setContactGroupMembership($cgm);
$person=new Google_Service_PeopleService_Person();
$groupMemberships=array(($membership));
$person->setMemberships(array($groupMemberships));//error happens here
Anyone could help with a proper example of creating contact group and assigning it to the contact?