protected boolean blockingCanList(Executor fileReadExecutor, String path) {
        return false;
    }
Returns whether the file at the specified {@code path} is a listable directory. This method returns
{@code false} by default.

@param fileReadExecutor the {@link Executor} which will perform the read operations against the file
@param path an absolute path that starts with {@code '/'}, whose component separator is {@code '/'}
@return {@code true} if the file is a listable directory. {@code false} if the directory does not exist
        or the file listing is not available.
core/src/main/java/com/linecorp/armeria/server/file/AbstractBlockingHttpVfs.java