src/main/java/com/workplacesystems/utilsj/collections/HashMap3.java
public int size()
    {
        int result = 0;
        // sum over all inner maps 
        for ( Iterator<K1> keys1 = maps.keySet().iterator(); keys1.hasNext(); )
        {
            Map2<K2,K3,V> inner_map = maps.get(keys1.next());
            result += inner_map.size();
        }
        return result;
    }
public int size()
    {
        int result = 0;
        // sum over all inner maps 
        for ( Iterator<K1> keys1 = maps.keySet().iterator(); keys1.hasNext(); )
        {
            Map2<K2,K3,V> inner_map = maps.get(keys1.next());
            result += inner_map.size();
        }
        return result;
    }
Returns the accumulated size of all the bottom level maps.