syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"fn_arg_sanity_check(cx,"}]}
source_snippet:         fn_arg_sanity_check(cx, fn_abi, spec_abi, arg);
context_before:     for arg in fn_abi.args.iter() {
context_after:     }