{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
    /// if that type is `{Meta,Pointee,}Sized`, or `None` if this ADT is always
    /// If this ADT is a struct, returns a type such that `Self: {Meta,Pointee,}Sized` if and only
    /// `{Meta,Pointee,}Sized`.