searchHook(name) {
		if (Jsep.hooks[name]) {
			const env = { context: this };
			Jsep.hooks[name].find(function (callback) {
				callback.call(env.context, env);
				return env.node;
			});
			return env.node;
		}
	}
Runs a given hook until one returns a node
@param {string} name
@returns {?jsep.Expression}