code: function ContactsGroupsAssignmentsGet(options, contactId, groupId) {
      ActionAbstract.call(this, options);
      this._groupId = groupId;
      this._contactId = contactId;
  }
docs: get group related to contact
  @see  http://dev.smsapi.pl/#!/contacts/getGroup_0
  @param {Object} options
  @param {String} contactId
  @param {String} groupId
  @extends ActionAbstract
  @constructor