Function has

src/openms/include/OpenMS/DATASTRUCTURES/StringUtilsSimple.h:117–120

    }

    static inline bool has(const String & this_s, Byte byte)
    {
      return this_s.find(char(byte)) != std::string::npos;
    }

    static inline String prefix(const String & this_s, size_t length)
    {