private static boolean getBoolean(String name, Boolean defaultValue, Predicate<Boolean> validator) {
        final Predicate<String> combinedValidator = value -> {
            if ("true".equals(value)) {
                return validator.test(true);
            }

            if ("false".equals(value)) {
                return validator.test(false);
            }
            return false;
        };
        return Boolean.valueOf(getNormalized(name, defaultValue.toString(), combinedValidator));
    }
Returns whether {@link AnnotatedService} should leave request/response content logs
by default when a {@link LoggingService} is added.

<p>By default, this option is enabled. Specify the
{@code -Dcom.linecorp.armeria.annotatedServiceContentLogging=false} JVM option to
override the default value.
core/src/main/java/com/linecorp/armeria/common/Flags.java