src/vs/workbench/contrib/files/common/explorerModel.ts/ExplorerItem/isExcluded
class ExplorerItem:	get isExcluded(): boolean {
		if (this._isExcluded) {
			return true;
		}
		if (!this._parent) {
			return false;
		}

		return this._parent.isExcluded;
	}