public override string ToString() {
StringBuilder sb = new StringBuilder("get_count_args(");
sb.Append("Key: ");
sb.Append(Key);
sb.Append(",Column_parent: ");
sb.Append(Column_parent== null ? "<null>" : Column_parent.ToString());
sb.Append(",Predicate: ");
sb.Append(Predicate== null ? "<null>" : Predicate.ToString());
sb.Append(",Consistency_level: ");
sb.Append(Consistency_level);
sb.Append(")");
return sb.ToString();
}