syntax_data: {"ast_node_type":"impl","tokens":[{"end":61,"kind":"keyword","start":0,"text":"\"forward"}]}
source_snippet:         "forward proc_macro::Span's `Debug` impl to `Span`"),
context_before:     span_debug: bool = (false, parse_bool, [UNTRACKED],
context_after:     /// o/w tests have closure@path