Graphviz (merkle_ledger.Merkle

module type S = sig ... end

Visualizable_ledger shows a subgraph of a merkle_ledger using Graphviz

module type Inputs_intf = sig ... end

module Make
  (Inputs : Inputs_intf) : 
  S with type addr := Inputs.Location.Addr.t and type ledger := Inputs.Ledger.t