question: explicitly registers the provided print service lookup implementation . the registration will silently fail returning false if the lookup service is already registered or the registration somehow else fails . concode_field_sep HashSet printServices concode_elem_sep HashSet printServiceLookups concode_elem_sep CupsPrintServiceLookup systemProvider concode_field_sep boolean registerService concode_elem_sep PrintService lookupDefaultPrintService concode_elem_sep MultiDocPrintService[] lookupMultiDocPrintServices concode_elem_sep MultiDocPrintService[] getMultiDocPrintServices concode_elem_sep PrintService[] lookupPrintServices concode_elem_sep PrintService getDefaultPrintService concode_elem_sep PrintService[] getPrintServices concode_elem_sep PrintService[] getPrintServices
target: boolean function ( PrintServiceLookup arg0 ) { return printServiceLookups . add ( arg0 ) ; }