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private String getOncallResponseWithRetry(String oncallLink) throws ExecutionException, RetryException {
        Predicate<String> empty = StringUtils::isBlank;
        Retryer<String> retryer = RetryerBuilder.<String>newBuilder()
                .retryIfExceptionOfType(Exception.class)
                .retryIfResult(empty)
                .withWaitStrategy(WaitStrategies.exponentialWait(2, INVOKE_RETRY_INTERVAL_SECONDS, TimeUnit.SECONDS))
                .withStopStrategy(StopStrategies.stopAfterAttempt(INVOKE_MAX_RETRY))
                .build();
 
        return retryer.call(() -> {
            return method().getString();
        });
 
 
    private static final long INVOKE_RETRY_INTERVAL_SECONDS = 3;
    private static final int INVOKE_MAX_RETRY = 4;

Main.java:1: error: class, interface, or enum expected
private String getOncallResponseWithRetry(String oncallLink) throws ExecutionException, RetryException {
        ^
Main.java:3: error: class, interface, or enum expected
        Retryer<String> retryer = RetryerBuilder.<String>newBuilder()
        ^
Main.java:4: error: <identifier> expected
                .retryIfExceptionOfType(Exception.class)
                                                       ^
Main.java:10: error: illegal start of type
        return retryer.call(() -> {
        ^
Main.java:10: error: <identifier> expected
        return retryer.call(() -> {
                           ^
Main.java:10: error: illegal start of type
        return retryer.call(() -> {
                            ^
Main.java:12: error: illegal start of type
        });
         ^
Main.java:16: error: reached end of file while parsing
    private static final int INVOKE_MAX_RETRY = 4;
                                                  ^
8 errors

Standard output is empty