src/vs/workbench/contrib/preferences/browser/preferencesEditor.ts/SettingsEditorContribution/constructor
class SettingsEditorContribution:	constructor(editor: ICodeEditor,
		@IInstantiationService instantiationService: IInstantiationService,
		@IPreferencesService preferencesService: IPreferencesService,
		@IWorkspaceContextService workspaceContextService: IWorkspaceContextService
	) {
		super(editor, instantiationService, preferencesService, workspaceContextService);
		this._register(this.workspaceContextService.onDidChangeWorkbenchState(() => this._onModelChanged()));
	}