src/vs/editor/standalone/browser/standaloneCodeEditorService.ts/StandaloneCodeEditorService/_checkContextKey
class StandaloneCodeEditorService:	private _checkContextKey(): void {
		let hasCodeEditor = false;
		for (const editor of this.listCodeEditors()) {
			if (!editor.isSimpleWidget) {
				hasCodeEditor = true;
				break;
			}
		}
		this._editorIsOpen.set(hasCodeEditor);
	}