syntax_data: {"ast_node_type":"function","tokens":[{"end":87,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn new_if_enabled(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Option<Self> {
context_before:     /// is enabled and `def_id` represents a function that is eligible for coverage.
context_after:         if !tcx.sess.instrument_coverage() || !tcx.is_eligible_for_coverage(def_id) {