src/vs/workbench/contrib/customEditor/browser/customEditorInput.ts/CustomEditorInput/decorateLabel
class CustomEditorInput:	private decorateLabel(label: string): string {
		const readonly = this.hasCapability(EditorInputCapabilities.Readonly);
		const orphaned = !!this._modelRef?.object.isOrphaned();

		return decorateFileEditorLabel(label, { orphaned, readonly });
	}