{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
        // This is basically identical to `try_slice_owned`,
    pub fn slice(self, slicer: impl FnOnce(&[u8]) -> &[u8]) -> OwnedSlice {
        // `slicer` can only return slices of its argument or some static data,