public void setConnectionIdentifiers(Set<String> connectionIdentifiers) {
        this.connectionIdentifiers = connectionIdentifiers;
    }
Sets the identifiers of all readable child connections 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 connectionIdentifiers
    The identifiers of all readable child connections within this
    connection group.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/connectiongroup/ConnectionGroupModel.java