presto-main/src/main/java/io/prestosql/operator/scalar/TryFunction.java/TryFunction/evaluate
class TryFunction:    public static <T> T evaluate(Supplier<T> supplier, T defaultValue)
    {
        try {
            return supplier.get();
        }
        catch (PrestoException e) {
            propagateIfUnhandled(e);
            return defaultValue;
        }
    }