src/vs/workbench/api/common/extHostWorkspace.ts/ExtHostWorkspace/getWorkspaceFolder
class ExtHostWorkspace:	getWorkspaceFolder(uri: vscode.Uri, resolveParent?: boolean): vscode.WorkspaceFolder | undefined {
		if (!this._actualWorkspace) {
			return undefined;
		}
		return this._actualWorkspace.getWorkspaceFolder(uri, resolveParent);
	}