This package is an internal implementation detail for our testing
infrastructure. It enables the framework to use the Skia Gold
infrastructure for tracking golden image tests.

See also:

 * https://skia.org/docs/dev/testing/skiagold/
 * https://flutter-gold.skia.org/
 * https://github.com/flutter/flutter/wiki/Writing-a-golden-file-test-for-package:flutter
