question: public boolean deleteOwnerName ( String owner ) { if ( ! _ownerList . contains ( owner ) ) { return false ; } _ownerList . remove ( owner ) ; log . debug ( "train (" + getName ( ) + ") delete car owner " + owner ) ; setDirtyAndFirePropertyChange ( OWNERS_CHANGED_PROPERTY , _ownerList . size ( ) + 1 , _ownerList . size ( ) ) ; return true ; }
target:  Delete a owner name that the train will either service or exclude. See setOwnerOption