syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"dep_node:"}]}
source_snippet:         dep_node: DepNodeIndex,
context_before:         cache_fresh_trait_pred: ty::PolyTraitPredicate<'tcx>,
context_after:         candidate: SelectionResult<'tcx, SelectionCandidate<'tcx>>,