{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"#[derive(Clone,"}]}
#[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord, Default)]
/// A `u64` but encoded with a fixed size; for hashes this encoding is more compact than `u64`.
pub struct Hash64 {