syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let typing_env = ty::TypingEnv::post_analysis(tcx, def.did());
context_before:                 && def.non_enum_variant().tail_opt().is_some_and(|last_field| {
context_after:                     !tcx.type_of(last_field.did).instantiate_identity().is_sized(tcx, typing_env)