BEGIN {
   # this line starts in column 0, and seems like runtime assignment
   *ID = \&Scalar::Util::refaddr; 

   # the same for these, later: 
   *_extract_default  = _extractor_for_pair_named('default');
   *_extract_init_arg = _extractor_for_pair_named('init_arg');
   *_extract_get      = _extractor_for_pair_named('get');
   *_extract_set      = _extractor_for_pair_named('set'); 
}


# later, in Class::Std::SCR...
my %values_of : ATTR ( :init_arg<values> );