syntax_data: {"ast_node_type":"import","tokens":[{"end":80,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// information that [`Builder::visit_coverage_branch_condition`] can use to
context_before:     /// we pre-emptively visit any affected `!` expressions, and record extra
context_after:     /// synthesize branch instrumentation for the enclosing `!`.