question: public boolean addLoadName ( String load ) { if ( _loadList . contains ( load ) ) { return false ; } _loadList . add ( load ) ; log . debug ( "train (" + getName ( ) + ") add car load " + load ) ; setDirtyAndFirePropertyChange ( LOADS_CHANGED_PROPERTY , _loadList . size ( ) - 1 , _loadList . size ( ) ) ; return true ; }
target:  Add a load that the train will either service or exclude. See setLoadOption