syntax_data: {"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                             let self_ty = trait_ref.self_ty();
context_before:                         if !trait_ref.references_error() {
context_after:                             let self_ty = self_ty.has_concrete_skeleton().then(|| self_ty);