{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"///"}]}
    /// Produces a MemPlace that works for ZST but nothing else.
impl<'tcx, Prov: Provenance> MPlaceTy<'tcx, Prov> {
    /// Conceptually this is a new allocation, but it doesn't actually create an allocation so you