{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"///"}]}
///   determined by finding the type of the `.0` field from `T`.
///   `field[0]` (aka `.0`), indicating that the type of `s` is
#[derive(Clone, Debug, TyEncodable, TyDecodable, Hash, HashStable, PartialEq)]