/// <returns>the inner Counter associated with key o</returns>
public virtual IntCounter <K2> GetCounter(K1 o)
{
IntCounter <K2> c = map[o];
if (c == null)
{
c = new IntCounter <K2>(innerMF);
c.SetDefaultReturnValue(defaultValue);
map[o] = c;
}
return(c);
}
public virtual IntCounter <Pair <K1, K2> > Flatten()
{
IntCounter <Pair <K1, K2> > result = new IntCounter <Pair <K1, K2> >();
result.SetDefaultReturnValue(defaultValue);
foreach (K1 key1 in FirstKeySet())
{
IntCounter <K2> inner = GetCounter(key1);
foreach (K2 key2 in inner.KeySet())
{
result.SetCount(new Pair <K1, K2>(key1, key2), inner.GetIntCount(key2));
}
}
return(result);
}
