logDebug( "addThreatType() called" );
logDebug( "==== Add Threat Model ====" );
    public void addThreatType( ThreatModelInterface threat_model )    {        logDebug( "addThreatType() called" );        if ( threat_model == null )        {            logError( "addThreatType() sent NULL ThreatModelInterface. " );            return;        }        addThreatVariation( threat_model );    } // method addThreatModel