public override String ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append("#");
sb.Append(posHeads.Count);
foreach (String key in posHeads.Keys)
{
sb.Append(",");
sb.Append(posHeads[key].Count);
}
sb.Append(" posHeads=");
sb.Append(posHeads.ToString());
sb.Append("\n");
sb.Append("#");
sb.Append(negHeads.Count);
foreach (String key in negHeads.Keys)
{
sb.Append(",");
sb.Append(negHeads[key].Count);
}
sb.Append(" negHeads=");
sb.Append(negHeads.ToString());
return sb.ToString();
}