{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"///"}]}
    /// Otherwise this function is best-effort (but must agree with `Machine::ptr_get_alloc`).
    /// identify the allocation this ptr points to (i.e., this must return `Some`).
    /// (Identifying the offset in that allocation, however, is harder -- use `Memory::ptr_get_alloc` for that.)