@Deprecated
    @Override
    default <V> Function<RequestOnlyLog, V> andThen(Function<? super LogLevel, ? extends V> after) {
        throw new UnsupportedOperationException();
    }
Returns a composed function that first applies this function to its input, and then applies the after
function to the result. If evaluation of either function throws an exception, it is relayed to the
caller of the composed function.

@deprecated Do not use this method.
core/src/main/java/com/linecorp/armeria/common/logging/RequestLogLevelMapper.java