GetVariableGroups.
        [Preview API] Get variable groups.
        :param str project: Project ID or project name
        :param str group_name: Name of variable group.
        :param str action_filter: Action filter for the variable group. It specifies the action which can be performed on the variable groups.
        :param int top: Number of variable groups to get.
        :param int continuation_token: Gets the variable groups after the continuation token provided.
        :param str query_order: Gets the results in the defined order. Default is 'IdDescending'.
        :rtype: [VariableGroup]

def get_variable_groups(self, project, group_name=None, action_filter=None, top=None, continuation_token=None, query_order=None):
        """GetVariableGroups.
        [Preview API] Get variable groups.
        :param str project: Project ID or project name
        :param str group_name: Name of variable group.
        :param str action_filter: Action filter for the variable group. It specifies the action which can be performed on the variable groups.
        :param int top: Number of variable groups to get.
        :param int continuation_token: Gets the variable groups after the continuation token provided.
        :param str query_order: Gets the results in the defined order. Default is 'IdDescending'.
        :rtype: [VariableGroup]
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        query_parameters = {}
        if group_name is not None:
            query_parameters['groupName'] = self._serialize.query('group_name', group_name, 'str')
        if action_filter is not None:
            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
        if top is not None:
            query_parameters['$top'] = self._serialize.query('top', top, 'int')
        if continuation_token is not None:
            query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'int')
        if query_order is not None:
            query_parameters['queryOrder'] = self._serialize.query('query_order', query_order, 'str')
        response = self._send(http_method='GET',
                              location_id='f5b09dd5-9d54-45a1-8b5a-1c8287d634cc',
                              version='5.0-preview.1',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('[VariableGroup]', self._unwrap_collection(response))