public function list_items( $args, $assoc_args ) {
		if ( ! empty( $assoc_args['format'] ) && 'count' === $assoc_args['format'] ) {
			$method = 'HEAD';
		} else {
			$method = 'GET';
		}
		list( $status, $body, $headers ) = $this->do_request( $method, $this->get_base_route(), $assoc_args );
		if ( ! empty( $assoc_args['format'] ) && 'ids' === $assoc_args['format'] ) {
			$items = array_column( $body, 'id' );
		} else {
			$items = $body;
		}

		if ( ! empty( $assoc_args['fields'] ) ) {
			foreach ( $items as $key => $item ) {
				$items[ $key ] = self::limit_item_to_fields( $item, $fields );
			}
		}

		if ( ! empty( $assoc_args['format'] ) && 'count' === $assoc_args['format'] ) {
			echo (int) $headers['X-WP-Total'];
		} elseif ( 'headers' === $assoc_args['format'] ) {
			echo json_encode( $headers );
		} elseif ( 'body' === $assoc_args['format'] ) {
			echo json_encode( $body );
		} elseif ( 'envelope' === $assoc_args['format'] ) {
			echo json_encode(
				array(
					'body'    => $body,
					'headers' => $headers,
					'status'  => $status,
					'api_url' => $this->api_url,
				)
			);
		} else {
			$formatter = $this->get_formatter( $assoc_args );
			$formatter->display_items( $items );
		}
	}