__gnu_debug::_BeforeBeginHelper.3cxx

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                                                    libstdc++ __gnu_debug::_BeforeBeginHelper<_Sequence>(3cxx)

template<typename_Sequence>
       struct __gnu_debug::_BeforeBeginHelper< _Sequence >"Helper struct to deal with sequence offering a
       before_begin iterator.

       __gnu_debug::_BeforeBeginHelper< _Sequence >

       #include <safe_iterator.h>

   StaticPublicMemberFunctions
       template<typename _Iterator , typename _Category > static bool _S_Is (const _Safe_iterator< _Iterator,
           _Sequence, _Category > &)
       template<typename _Iterator , typename _Category > static bool _S_Is_Beginnest (const _Safe_iterator<
           _Iterator, _Sequence, _Category > &__it)