syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if $sub_hashes
context_before:     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr) => {
context_after:             .insert(stringify!($opt_name), $opt_expr as &dyn dep_tracking::DepTrackingHash)