| // Copyright The OpenTelemetry Authors// SPDX-License-Identifier: Apache-2.0#pragma once#include <type_traits>#include "opentelemetry/version.h"OPENTELEMETRY_BEGIN_NAMESPACEnamespace nostd{template <class T>using decay_t = typename std::decay<T>::type;}  // namespace nostdOPENTELEMETRY_END_NAMESPACE
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