printer.h

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// Copyright (c) The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef EXAMPLE_PRINTER_H
#define EXAMPLE_PRINTER_H

#include <string>

class Printer
{
public:
    virtual ~Printer() = default;
    virtual void print(const std::string& message) = 0;
};

#endif // EXAMPLE_PRINTER_H