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