syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// A candidate for proving a trait or alias-relate goal.
context_before:     NormalizedSelfTyAssembly,
context_after:     TraitCandidate { source: CandidateSource<I>, result: QueryResult<I> },