removeStorageItems method
Removes keys from extension storage in the given storageArea.
id ID of extension.
storageArea StorageArea to remove data from.
keys Keys to remove.
Implementation
Future<void> removeStorageItems(
  String id,
  StorageArea storageArea,
  List<String> keys,
) async {
  await _client.send('Extensions.removeStorageItems', {
    'id': id,
    'storageArea': storageArea,
    'keys': [...keys],
  });
}