syntax_data: {"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let ImplCandidate(def_id) = candidate
context_before:         // Treat reservation impls as ambiguity.
context_after:             && let ty::ImplPolarity::Reservation = tcx.impl_polarity(def_id)