syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Extremely important check for all ADTs! Make sure they opted-in to be used in
context_before:             ty::Adt(adt_def, _) if !self.type_marked_structural(ty) => {
context_after:                 // patterns.