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#!/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2022  Iván Alejandro Ávalos Díaz <avalos@disroot.org>
#                     Edgar Alexis López Martínez <edgarmlmp@gmail.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
import graphviz as gv
from typing import Protocol, runtime_checkable
from abc import abstractmethod

@runtime_checkable
class Graphable(Protocol):
    @abstractmethod
    def graph(self, dot: gv.Digraph, parent: str = None, edge: str = None) -> None:
        raise NotImplementedError