public boolean isInstalled() {
        return JDBCEnvironment.isClassDefined(driverClass);
    }
Returns whether this MySQL JDBC driver is installed and can be found
within the Java classpath.

@return
    true if this MySQL JDBC driver is installed, false otherwise.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/conf/MySQLDriver.java