@Override
@SuppressWarnings("unchecked")
public ProtocolWaveletOperationJsoImpl getOperation(int n) {
initArray(this, keyOperation);
JsArray<ProtocolWaveletOperationJsoImpl> array = getPropertyAsObject(this, keyOperation).cast();
if (n < 0) throw new IllegalArgumentException("index " + n + " < 0");
if (array.length() <= n)
throw new IllegalArgumentException("index " + n + ">= array length " + array.length());
return array.get(n);
}