=> sub { $push_to->(\%shared_sources, $expand_variables->($+{INDEX}),
\$attributes{sources}, $+{ATTRIBS},
tokenize($expand_variables->($+{VALUE})))
if !@skip || $skip[$#skip] > 0; },
=> sub { $push_to->(\%shared_sources, $expand_variables->($+{INDEX}),
\$attributes{sources}, $+{ATTRIBS},
tokenize($expand_variables->($+{VALUE})))
if !@skip || $skip[$#skip] > 0; },