public final Map<String, String> getAllDocStrings(ClassLoader classLoader) {
        requireNonNull(classLoader, "classLoader");
        return cached.computeIfAbsent(classLoader, this::getAllDocStrings0);
    }
Extract all docstrings from files at the configured path, delegating to
{@link #getDocStringsFromFiles(Map)} for actual processing.
core/src/main/java/com/linecorp/armeria/server/docs/DocStringExtractor.java