method queryUsageAndQuota

Source

void queryUsageAndQuota(StorageUsageCallback usageCallback,
    [StorageErrorCallback errorCallback]) {
  if (errorCallback != null) {
    _blink.BlinkDeprecatedStorageQuota.instance
        .queryUsageAndQuota_Callback_2_(this, usageCallback, errorCallback);
    return;
  }
  _blink.BlinkDeprecatedStorageQuota.instance
      .queryUsageAndQuota_Callback_1_(this, usageCallback);
  return;
}