syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // replace it with the enclosing `!` collected by `visit_unary_not`.
context_before:         // If this condition expression is nested within one or more `!` expressions,
context_after:         if let Some(&NotInfo { enclosing_not, is_flipped }) = coverage_info.nots.get(&expr_id) {