throw ExceptionFactory.get("Property already exists: " + propertyName);
}
data = data.cloneAndSetProperty(from, value, rev);
diff.encodedValue(value);
}
diff.newline();
break;
case '-':
diff.tag('-').value(path).newline();
if (data.exists(from) || !getRevisionDataRoot(revisionId).exists(from)) {
// this will fail if the node didn't exist