WP_REST_Global_Styles_Controller::get_theme_items() WordPress Method

	public function get_theme_items( $request ) {
		if ( wp_get_theme()->get_stylesheet() !== $request['stylesheet'] ) {
			// This endpoint only supports the active theme for now.
			return new WP_Error(
				'rest_theme_not_found',
				__( 'Theme not found.' ),
				array( 'status' => 404 )
			);
		}

		$variations = WP_Theme_JSON_Resolver::get_style_variations();
		$response   = rest_ensure_response( $variations );

		return $response;
	}