public bool ContainsExclusive(JwTimestampInterval ti)
{
if ( ti == null ) return false;
return ContainsExclusive(ti.GetStart()) &&
ContainsExclusive(ti.GetEnd());
}
public bool Intersects(JwTimestampInterval ti)
{
if ( ti == null ) return false;
if ( Contains(ti.GetStart()) ) return true;
if ( Contains(ti.GetEnd()) ) return true;
if ( ti.Contains(GetStart()) ) return true;
return false;
}