syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"ty::FnDef(..)"}]}
source_snippet:         ty::FnDef(..) | ty::Dynamic(_, _, ty::Dyn) | ty::Foreign(..) => {
context_before:         // Odd unit types.
context_after:             let sized = matches!(ty.kind(), ty::FnDef(..));