@Override
    public void setIdentifier(String identifier) {
        throw new UnsupportedOperationException("Connection group identifiers are derived from IDs. They cannot be set.");
    }
Sets the identifiers of all readable child connection groups within this
connection group. This should be set only when the parent connection
group is queried, as it has no effect when a connection group is
inserted, updated, or deleted.

@param connectionGroupIdentifiers
    The identifiers of all readable child connection groups within this
    connection group.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/connectiongroup/ConnectionGroupModel.java