getQuota method
Retrieves the quota for the user/quotaRoot.
Optionally define the quotaRoot which defaults to "".
Note that the server needs to support the QUOTA capability.
Implementation
Future<QuotaResult> getQuota({String quotaRoot = '""'}) {
quotaRoot = quotaRoot.contains(' ') ? '"$quotaRoot"' : quotaRoot;
final cmd = Command('GETQUOTA $quotaRoot');
final parser = QuotaParser();
return sendCommand<QuotaResult>(cmd, parser);
}