src/vs/workbench/contrib/notebook/browser/notebookServiceImpl.ts/NotebookProviderInfoStore/clearEditorCache
class NotebookProviderInfoStore:	clearEditorCache() {
		const mementoObject = this._memento.getMemento(StorageScope.GLOBAL, StorageTarget.MACHINE);
		mementoObject[NotebookProviderInfoStore.CUSTOM_EDITORS_ENTRY_ID] = [];
		this._memento.saveMemento();
	}