syntax_data: {"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let unsizing_params = tcx.unsizing_params_for_adt(def.did());
context_before:             (&ty::Adt(def, args_a), &ty::Adt(_, args_b)) => {
context_after:                 if unsizing_params.is_empty() {