syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub self_ty: Option<Ty<'tcx>>,
context_before:     pub trait_ref: ty::TraitRef<'tcx>,
context_after:     pub intercrate_ambiguity_causes: FxIndexSet<IntercrateAmbiguityCause<'tcx>>,