| 1234567891011121314151617181920 | #pragma once#include <ostream>#include <streambuf>// from https://stackoverflow.com/a/8244052class NullStreambuf : public std::streambuf {  char dummyBuffer[64];protected:  virtual int overflow(int c) override final;};class NullOStream final : private NullStreambuf, public std::ostream {public:  NullOStream() : std::ostream(this) {}  NullStreambuf *rdbuf() { return this; }  virtual void avoidOutOfLineVirtualCompilerWarning();};
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