syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"$opt_expr.gather_target_modifiers($mods,"}]}
source_snippet:         $opt_expr.gather_target_modifiers($mods, $tmod_vals);
context_before:     ($_opt_name:ident, $opt_expr:expr, $mods:expr, $tmod_vals:expr, [SUBSTRUCT $substruct_enum:ident]) => {
context_after:     };