syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Negative trait bounds do not imply any supertrait bounds
context_before:             ty::ClauseKind::Trait(data) => {
context_after:                 if data.polarity != ty::PredicatePolarity::Positive {