public override string ToString()
{
StringBuilder sb = new StringBuilder("revoke_role_args(");
sb.Append("Role_name: ");
sb.Append(Role_name);
sb.Append(",Principal_name: ");
sb.Append(Principal_name);
sb.Append(",Principal_type: ");
sb.Append(Principal_type);
sb.Append(")");
return sb.ToString();
}