syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"fast_reject::simplify_type(tcx,"}]}
source_snippet:             fast_reject::simplify_type(tcx, trait_ref.self_ty(), TreatParams::InstantiateWithInfer)
context_before:         if let Some(st) =
context_after:         {