syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// is enabled and `def_id` represents a function that is eligible for coverage.
context_before:     /// Creates a new coverage info builder, but only if coverage instrumentation
context_after:     pub(crate) fn new_if_enabled(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Option<Self> {