Maker (irmin-git.Irmin

module G : sig ... end

type endpoint = Mimic.ctx * Smart_git.Endpoint.t

module Make
  (Schema : 
    Schema.S
      with type Hash.t = G.hash
       and type Node.t = G.Value.Tree.t
       and type Commit.t = G.Value.Commit.t) : 
  sig ... end

The Git backend specializes a few types: