syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:                     | (ty::ImplPolarity::Positive, ty::PredicatePolarity::Positive)
context_before:                     (ty::ImplPolarity::Reservation, _)
context_after:                     | (ty::ImplPolarity::Negative, ty::PredicatePolarity::Negative) => {