def METHOD_NAME(self, request):
    """
    Gets and Sets version related info in mem cache and request cache; and returns a dict of it.
    It sets request cache data for last_supported_date and latest_version with memcached values if exists against
    user app properties else computes the values for specific platform and sets it in both memcache (for next
    server interaction from same app version/platform) and request cache
    Returns:
        dict: Containing app version info
    """
    user_agent = request.headers.get('User-Agent')
    if user_agent:
        platform = self._get_platform(request, user_agent)
        if platform:
            request_cache_dict = get_cache(self.REQUEST_CACHE_NAME)
            request_cache_dict[self.USER_APP_VERSION] = platform.version
            last_supported_date_cache_key = self._get_cache_key_name(
                self.LAST_SUPPORTED_DATE_HEADER,
                platform.NAME + platform.version
            )
            latest_version_cache_key = self._get_cache_key_name(self.LATEST_VERSION_HEADER, platform.NAME)
            cached_data = cache.get_many([last_supported_date_cache_key, latest_version_cache_key])
            last_supported_date = cached_data.get(last_supported_date_cache_key)
            if last_supported_date != self.NO_LAST_SUPPORTED_DATE and not isinstance(last_supported_date, datetime):
                last_supported_date = self._get_last_supported_date(platform.NAME, platform.version)
                cache.set(last_supported_date_cache_key, last_supported_date, self.CACHE_TIMEOUT)
            request_cache_dict[self.LAST_SUPPORTED_DATE_HEADER] = last_supported_date
            latest_version = cached_data.get(latest_version_cache_key)
            if not (latest_version and isinstance(latest_version, str)):
                latest_version = self._get_latest_version(platform.NAME)
                cache.set(latest_version_cache_key, latest_version, self.CACHE_TIMEOUT)
            request_cache_dict[self.LATEST_VERSION_HEADER] = latest_version
            return request_cache_dict