use git_hash::ObjectId;use git_object::bstr::BString; /// A parsed ref log line that can be changed#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub struct Line {    /// The previous object id. Can be a null-sha to indicate this is a line for a new ref.    pub previous_oid: ObjectId,    /// The new object id. Can be a null-sha to indicate this ref is being deleted.    pub new_oid: ObjectId,    /// The signature of the currently configured committer.    pub signature: git_actor::Signature,    /// The message providing details about the operation performed in this log line.    pub message: BString,}