public boolean test(T t) {
        try {
            return delegate.test(t);
        } catch (Throwable cause) {
            // Do not write the following log message every time because an abnormal request may be
            // from an abusing user or a hacker and logging it every time may affect system performance.
            if (Flags.verboseExceptionSampler().isSampled(cause.getClass())) {
                logger.warn("Failed to evaluate the value of header or param '{}'. " +
                            "You MUST catch and handle this exception properly: " +
                            "input={}", name, t, cause);
            }
            return false;
        }
    }
Tests the specified {@code t} object.

@see DefaultRoute where this predicate is evaluated
core/src/main/java/com/linecorp/armeria/server/RoutingPredicate.java