question: set the regular expression on which to filter along with any special options to use when compiling the expression . concode_field_sep Pattern _pattern concode_elem_sep PatternMatcher _matcher concode_elem_sep PatternCache _cache concode_field_sep boolean accept concode_elem_sep boolean accept
target: void function ( String arg0 , int arg1 ) { _pattern = _cache . getPattern ( arg0 , arg1 ) ; }