syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"\"for"}]}
source_snippet:         "for every macro invocation, print its name and arguments (default: no)"),
context_before:     trace_macros: bool = (false, parse_bool, [UNTRACKED],
context_after:     track_diagnostics: bool = (false, parse_bool, [UNTRACKED],