stacksmodel is readonly

src/vs/workbench/browser/parts/editor/editorPart.ts

@@ -150,7 +150,7 @@ export class EditorPart extends Part implements IEditorPart {
 		if (!options) { options = null; }
 
 		// Determine position to open editor in (left, center, right)
-		let position = this.findPosition(arg3, widthRatios);
+		const position = this.findPosition(arg3, widthRatios);
 
 		// In case the position is invalid, return early. This can happen when the user tries to open a side editor
 		// when the maximum number of allowed editors is reached and no more side editor can be opened.

src/vs/workbench/common/editor/editorStacksModel.ts

@@ -30,15 +30,18 @@ export interface IEditorGroup {
 	onEditorUnpinned: Event<EditorInput>;
 
 	getEditors(mru?: boolean): EditorInput[];
+	isActive(editor: EditorInput): boolean;
+	isPreview(editor: EditorInput): boolean;
+	isPinned(editor: EditorInput): boolean;
+
+	// --- Modifying:
+
 	// openEditor(editor: EditorInput, options?: IEditorOpenOptions): void;
 	// moveEditor(editor: EditorInput, toIndex: number): void;
 	// closeEditor(editor: EditorInput): void;
 	// closeEditors(except: EditorInput, direction?: Direction): void;
 	// closeAllEditors(): void;
 	// setActive(editor: EditorInput): void;
-	isActive(editor: EditorInput): boolean;
-	isPreview(editor: EditorInput): boolean;
-	isPinned(editor: EditorInput): boolean;
 
 	// pin(editor: EditorInput): void;
 	// unpin(editor: EditorInput): void;
@@ -56,14 +59,16 @@ export interface IEditorStacksModel {
 
 	getGroup(id: GroupIdentifier): IEditorGroup;
 
-	openGroup(label: string): IEditorGroup;
+	// --- Modifying:
+
+	// openGroup(label: string): IEditorGroup;
 
-	closeGroup(group: IEditorGroup): void;
-	closeGroups(except?: IEditorGroup): void;
+	// closeGroup(group: IEditorGroup): void;
+	// closeGroups(except?: IEditorGroup): void;
 
-	moveGroup(group: IEditorGroup, toIndex: number): void;
+	// moveGroup(group: IEditorGroup, toIndex: number): void;
 
-	setActive(group: IEditorGroup): void;
+	// setActive(group: IEditorGroup): void;
 }
 
 export type GroupIdentifier = number;