carpseeds.pl/wp-content/plugins/jetpack.bck/json-endpoints/jetpack/class.jetpack-json-api-themes-get-endpoint.php

<?php

class Jetpack_JSON_API_Themes_Get_Endpoint extends Jetpack_JSON_API_Themes_Endpoint {
	// GET  /sites/%s/themes/%s
	protected $needed_capabilities = 'switch_themes';
}