public override string ToString() {
StringBuilder sb = new StringBuilder("TokenRange(");
sb.Append("Start_token: ");
sb.Append(Start_token);
sb.Append(",End_token: ");
sb.Append(End_token);
sb.Append(",Endpoints: ");
sb.Append(Endpoints);
sb.Append(",Rpc_endpoints: ");
sb.Append(Rpc_endpoints);
sb.Append(",Endpoint_details: ");
sb.Append(Endpoint_details);
sb.Append(")");
return sb.ToString();
}