/// How to interpret a revision specification, or `revspec`.#[derive(Debug, Copy, Clone, PartialOrd, PartialEq, Ord, Eq, Hash)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum Kind {    /// A single revision specification, pointing at one reference.    Single,    /// Two revision specifications `a` and `b` where we want all commits from `b` that are not also in `a`.    Range,    /// Everything in `a` and `b` but no commit from any of their merge bases.    MergeBase,} impl Default for Kind {    fn default() -> Self {        Kind::Single    }} ///pub mod parse;pub use parse::function::parse;