question: get an immutable set representing all the spider addresses here concode_field_sep Boolean useProxies concode_elem_sep Logger log concode_elem_sep IPTable table concode_elem_sep List<Pattern> agents concode_elem_sep List<Pattern> domains concode_field_sep void loadPatterns concode_elem_sep boolean isUseProxies concode_elem_sep boolean isSpider concode_elem_sep boolean isSpider concode_elem_sep boolean isSpider concode_elem_sep void loadSpiderIpAddresses concode_elem_sep Set<String> readPatterns
target: Set < String > function ( ) { loadSpiderIpAddresses ( ) ; return table . toSet ( ) ; }