syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"ty::TraitRef::new(cx,"}]}
source_snippet:                     ty::TraitRef::new(cx, did, [self_ty])
context_before:                 let trait_ref = if generics.count() == 1 {
context_after:                 } else {