syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"var_values:"}]}
source_snippet:             var_values: cx.mk_args_from_iter(infos.iter().enumerate().map(
context_before:         CanonicalVarValues {
context_after:                 |(i, kind)| -> I::GenericArg {