@Deprecated
    public LoggingDecoratorBuilder requestLogLevelMapper(
            Function<? super RequestOnlyLog, LogLevel> requestLogLevelMapper) {
        requireNonNull(requestLogLevelMapper, "requestLogLevelMapper");
        maybeCreateLogWriterBuilder().requestLogLevelMapper(requestLogLevelMapper::apply);
        return this;
    }
Sets the {@link Function} to use when mapping the log level of request logs.

@deprecated Use {@link #requestLogLevelMapper(RequestLogLevelMapper)} instead.
core/src/main/java/com/linecorp/armeria/common/logging/LoggingDecoratorBuilder.java