public function get_items( $request ) {
		$args = array(
			'type'         => $request['type'],
			'order'        => $request['order'],
			'fields'       => $request['fields'],
			'orderby'      => $request['orderby'],
			'user_id'      => $request['user_id'],
			'include'      => $request['include'],
			'parent_id'    => $request['parent_id'],
			'exclude'      => $request['exclude'],
			'search_terms' => $request['search'],
			'meta_query'   => $request['meta'], // phpcs:ignore
			'group_type'   => $request['group_type'],
			'show_hidden'  => $request['show_hidden'],
			'per_page'     => $request['per_page'],
			'status'       => $request['status'],
			'page'         => $request['page'],
		);

		if ( empty( $request['parent_id'] ) ) {
			$args['parent_id'] = null;
		}

		/**
		 * Filter the query arguments for the request.
		 *
		 * @since 5.0.0
		 *
		 * @param array           $args    Key value array of query var to query value.
		 * @param WP_REST_Request $request The request sent to the API.
		 */
		$args = apply_filters( 'bp_rest_groups_get_items_query_args', $args, $request );

		// Actually, query it.
		$groups = groups_get_groups( $args );

		// Users need (at least, should we be more restrictive ?) to be logged in to use the edit context.
		if ( 'edit' === $request->get_param( 'context' ) && ! is_user_logged_in() ) {
			$request->set_param( 'context', 'view' );
		}

		$retval = array();
		foreach ( $groups['groups'] as $group ) {
			$retval[] = $this->prepare_response_for_collection(
				$this->prepare_item_for_response( $group, $request )
			);
		}

		$response = rest_ensure_response( $retval );
		$response = bp_rest_response_add_total_headers( $response, $groups['total'], $args['per_page'] );

		/**
		 * Fires after a list of groups is fetched via the REST API.
		 *
		 * @since 5.0.0
		 *
		 * @param array            $groups   Fetched groups.
		 * @param WP_REST_Response $response The response data.
		 * @param WP_REST_Request  $request  The request sent to the API.
		 */
		do_action( 'bp_rest_groups_get_items', $groups, $response, $request );

		return $response;
	}