question: public void addAdditionalPartyRole ( String partyId , String roleTypeId ) { List < String > parties = additionalPartyRole . get ( roleTypeId ) ; if ( parties != null ) { for ( String pi : parties ) { if ( pi . equals ( partyId ) ) { return ; } } } else { parties = new LinkedList < String > ( ) ; additionalPartyRole . put ( roleTypeId , parties ) ; } parties . add ( 0 , partyId ) ; }
target:  Associates a party with a role to the order.