src/vs/workbench/browser/parts/editor/editorGroupView.ts/EditorGroupView/onDidChangeEditorCapabilities
class EditorGroupView:	private onDidChangeEditorCapabilities(editor: EditorInput): void {

		// Forward to title control
		this.titleAreaControl.updateEditorCapabilities(editor);

		// Event
		this._onDidGroupChange.fire({ kind: GroupChangeKind.EDITOR_CAPABILITIES, editor });
	}