public Builder setMaxCacheSizeOnVeryLowDiskSpace(long maxCacheSizeOnVeryLowDiskSpace) {
      mMaxCacheSizeOnVeryLowDiskSpace = maxCacheSizeOnVeryLowDiskSpace;
      return this;
    }
This is the maximum size of the cache when the device is extremely low on disk space.

<p>See {@link DiskTrimmable#trimToNothing()}.
imagepipeline-base/src/main/java/com/facebook/cache/disk/DiskCacheConfig.java