syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"\"measure"}]}
source_snippet:         "measure time of each rustc pass (default: no)"),
context_before:     time_passes: bool = (false, parse_bool, [UNTRACKED],
context_after:     time_passes_format: TimePassesFormat = (TimePassesFormat::Text, parse_time_passes_format, [UNTRACKED],