public Integer getMaxConnections() {
        return maxConnections;
    }
Returns the maximum number of connections that can be established to
this connection group concurrently.

@return
    The maximum number of connections that can be established to this
    connection group concurrently, zero if no restriction applies, or
    null if the default restrictions should be applied.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/connectiongroup/ConnectionGroupModel.java