retore awol feature and fix tests with that

src/vs/editor/contrib/documentSymbols/outlineModel.ts

@@ -443,7 +443,7 @@ export class OutlineModel extends TreeElement {
 		}
 	}
 
-	asListOfDocumentSymbols(): DocumentSymbol[] {
+	getTopLevelSymbols(): DocumentSymbol[] {
 		const roots: DocumentSymbol[] = [];
 		for (const child of this.children.values()) {
 			if (child instanceof OutlineElement) {
@@ -452,9 +452,14 @@ export class OutlineModel extends TreeElement {
 				roots.push(...Iterable.map(child.children.values(), child => child.symbol));
 			}
 		}
+		return roots.sort((a, b) => Range.compareRangesUsingStarts(a.range, b.range));
+	}
+
+	asListOfDocumentSymbols(): DocumentSymbol[] {
+		const roots = this.getTopLevelSymbols();
 		const bucket: DocumentSymbol[] = [];
 		OutlineModel._flattenDocumentSymbols(bucket, roots, '');
-		return bucket;
+		return bucket.sort((a, b) => Range.compareRangesUsingStarts(a.range, b.range));
 	}
 
 	private static _flattenDocumentSymbols(bucket: DocumentSymbol[], entries: DocumentSymbol[], overrideContainerLabel: string): void {

src/vs/editor/contrib/gotoSymbol/documentSymbols.ts

@@ -15,7 +15,9 @@ import { assertType } from 'vs/base/common/types';
 
 export async function getDocumentSymbols(document: ITextModel, flat: boolean, token: CancellationToken): Promise<DocumentSymbol[]> {
 	const model = await OutlineModel.create(document, token);
-	return model.asListOfDocumentSymbols();
+	return flat
+		? model.asListOfDocumentSymbols()
+		: model.getTopLevelSymbols();
 }
 
 CommandsRegistry.registerCommand('_executeDocumentSymbolProvider', async function (accessor, ...args) {