logDebug( "NULL found for DiagnosisTechSpecInterface.");
if ( _logger.isDebugEnabled() ) _logger.debug( "NULL found for DiagnosisTechSpecInterface.");
    public void addSensorType( DiagnosisTechSpecInterface diag_ts )    {        if ( diag_ts == null )        {            logDebug( "NULL found for DiagnosisTechSpecInterface.");            return;        }        // DO not make the assumption that the asset type model exists        // for this sensor.  Try to add and/or fetch the model first.        //        AssetType asset_type = diag_ts.getAssetType();        AssetTypeModel asset_type_model = getOrCreateAssetTypeModel( asset_type );        if ( asset_type_model == null )            return;        logDetail( "==== Start: Add Sensor Type ====" );                SensorTypeModel s_model;        try        {                        s_model= asset_type_model.addSensorTypeModel( diag_ts );                        logDetail( "Added New SensorTypeModel:\n"                       + s_model.toString() );                        }        catch (BelievabilityException be)        {            logError( "Cannot add SensorTypeModel "                      +  diag_ts.getName() + ": " + be.getMessage() );            return;        }        logDebug( "Added sensor: " + s_model.getName() );    } // method addSensorType