src/vs/workbench/contrib/customEditor/browser/customEditorInputFactory.ts/ComplexCustomWorkingCopyEditorHandler/constructor
class ComplexCustomWorkingCopyEditorHandler:	constructor(
		@IInstantiationService private readonly _instantiationService: IInstantiationService,
		@IWorkingCopyEditorService private readonly _workingCopyEditorService: IWorkingCopyEditorService,
		@IWorkingCopyBackupService private readonly _workingCopyBackupService: IWorkingCopyBackupService,
		@IWebviewService private readonly _webviewService: IWebviewService,
		@ICustomEditorService _customEditorService: ICustomEditorService // DO NOT REMOVE (needed on startup to register overrides properly)
	) {
		super();

		this._installHandler();
	}