{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"///"}]}
    /// `OpTy` or `ImmTy`, the new layout must have almost the same ABI as the old one
    /// not all transmutes are supported by all projectables -- specifically, if this is an
    /// (only changing the `valid_range` is allowed and turning integers into pointers).