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#pragma once
#include <optional>
#include <string_view>
namespace NYql {
bool IsUtf8(const std::string_view& str);
unsigned char WideCharSize(char head);
std::optional<std::string> RoundToNearestValidUtf8(const std::string_view& str, bool roundDown);
std::optional<std::string> NextValidUtf8(const std::string_view& str);
std::optional<std::string> NextLexicographicString(const std::string_view& str);
}
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