getTagData(name, tag) {
		const info = this.scope.definitions.get(name);
		if (info instanceof VariableInfo) {
			let tagInfo = info.tagInfo;
			while (tagInfo !== undefined) {
				if (tagInfo.tag === tag) return tagInfo.data;
				tagInfo = tagInfo.next;
			}
		}
	}
@param {string} name name
@param {Tag} tag tag info
@returns {TagData | undefined} tag data