src/vs/platform/files/browser/htmlFileSystemProvider.ts/HTMLFileSystemProvider/getHandle
class HTMLFileSystemProvider:	async getHandle(resource: URI): Promise<FileSystemHandle | undefined> {

		// First: try to find a well known handle first
		let handle = await this.doGetHandle(resource);

		// Second: walk up parent directories and resolve handle if possible
		if (!handle) {
			const parent = await this.getDirectoryHandle(this.extUri.dirname(resource));
			if (parent) {
				const name = extUri.basename(resource);
				try {
					handle = await parent.getFileHandle(name);
				} catch (error) {
					try {
						handle = await parent.getDirectoryHandle(name);
					} catch (error) {
						// Ignore
					}
				}
			}
		}

		return handle;
	}