{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"///"}]}
    /// identify the allocation this ptr points to (i.e., this must return `Some`).
    /// If `OFFSET_IS_ADDR == false`, provenance must always be able to
    /// Otherwise this function is best-effort (but must agree with `Machine::ptr_get_alloc`).