syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"\"tracks"}]}
source_snippet:         "tracks where in rustc a diagnostic was emitted"),
context_before:     track_diagnostics: bool = (false, parse_bool, [UNTRACKED],
context_after:     // Diagnostics are considered side-effects of a query (see `QuerySideEffect`) and are saved