sb.append( " with sensor " ); sb.append( _sensor_name );
    public String toString() {     StringBuffer sb = new StringBuffer();     sb.append( "BelievabilityDiagnosis: asset " );     sb.append( this.getAssetID().toString() );     sb.append( " asserted diagnosis " );     sb.append( _diagnosis_value );     sb.append( " at time " + _last_asserted_timestamp );     return sb.toString();    }