syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":".sizedness_constraint(tcx,"}]}
source_snippet:                 .sizedness_constraint(tcx, sizedness)
context_before:             ty::Adt(def, args) => def
context_after:                 .is_none_or(|ty| ty.instantiate(tcx, args).has_trivial_sizedness(tcx, sizedness)),