GuiProof.printermethod on_click : ( Wp.ProofEngine.position -> unit ) -> unitmethod on_backtrack : ( Wp.ProofEngine.node -> unit ) -> unitmethod pp_main : Stdlib.Format.formatter -> Wp.ProofEngine.tree -> unitmethod pp_node : Stdlib.Format.formatter -> Wp.ProofEngine.node -> unitmethod pending : Wp.ProofEngine.node -> unitmethod status : Wp.ProofEngine.tree -> unitmethod tree : Wp.ProofEngine.tree -> unit