buildKey method
Implementation
String buildKey() {
if (atKeyObj.key != null) {
return atKeyObj.toString();
}
super.atKeyObj
..key = atKey
..sharedBy = sharedBy
..sharedWith = sharedWith
..isLocal = isLocal
..metadata = (Metadata()
..isPublic = isPublic
..isCached = isCached);
// validates the data in the verb builder.
// If validation is successful, build and return the key;
// else throws exception.
validateKey();
return super.atKeyObj.toString();
}