{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
        // Since we are copying `size` bytes from `src` to `dest + i * size` (`for i in 0..repeat`),
    pub fn prepare_copy(&self, range: AllocRange) -> InitCopy {
        // a naive initialization mask copying algorithm would repeatedly have to read the initialization mask from