class GateioUtils {

  public static String toPairString(CurrencyPair currencyPair) {<FILL_FUNCTION_BODY>}
}


    String baseSymbol = currencyPair.base.getCurrencyCode().toLowerCase();
    String counterSymbol = currencyPair.counter.getCurrencyCode().toLowerCase();
    String pair = baseSymbol + "_" + counterSymbol;

    return pair;
  
<no_super_class>