typedef typename ValInfo::value_type value_type;
typedef typename ValInfo::value_type_ref value_type_ref;
typedef typename ValInfo::key_type key_type;
typedef typename ValInfo::key_type_ref key_type_ref;
typedef typename ValInfo::data_type data_type;
typedef typename ValInfo::data_type_ref data_type_ref;
typedef typename ValInfo::value_type value_type;
typedef typename ValInfo::value_type_ref value_type_ref;
typedef typename ValInfo::key_type key_type;
typedef typename ValInfo::key_type_ref key_type_ref;
typedef typename ValInfo::data_type data_type;
typedef typename ValInfo::data_type_ref data_type_ref;