public boolean containsKey(Object key) 
{
return false;
}

 public boolean containsValue(Object value) 
{
return false;
}

 public Set entrySet() 
{
return emptySet();
}

 public boolean equals(Object o) 
{
            return (o instanceof Map) && ((Map< ?,? >)o).isEmpty();
}

 public V get(Object key) 
{
return null;
}

 public int hashCode() 
{
return 0;
}

 public boolean isEmpty() 
{
return true;
}

 public Set keySet() 
{
return emptySet();
}

 public int size() 
{
                                    return 0;
}

 public Collection values() 
{
return emptySet();
}