contains для std::map. Индусский метод(копипаста)

bool CSomeClass::IsContainsSomeID(U32_t SomeId)
{
    bool bRet  = false;
    std::vector<U32_t> SomeIdsVec;

    SOME_MAP::const_iterator i = m_Map.begin(); // typedef std::map< U32_t, SomePointer* > SOME_MAP;
    while( i != m_Map.end() )
    {
        SomeIdsVec.push_back(i->first);
        ++i;
    }

    for ( U32_t index = 0; index < SomeIdsVec.size(); index++ )
    {
        if ( SomeId == SomeIdsVec[index] )
        {
             bRet = true;
             break;
        }
    }
 
     return bRet;
}