public static EmptyHttpResponseException get() {
        return isSampled() ? new EmptyHttpResponseException(null, null, true, true) : INSTANCE;
    }
Returns a {@link EmptyHttpResponseException} which may be a singleton or a new instance,
depending on {@link Flags#verboseExceptionSampler()}'s decision.
core/src/main/java/com/linecorp/armeria/common/EmptyHttpResponseException.java