mark Snapshot as internal

jiripudil · jiripudil · commit 4ee1cb0f5973 · 2020-09-09T10:31:40.000+02:00
diff --git a/src/Framework/Snapshot.php b/src/Framework/Snapshot.php
@@ -12,6 +12,7 @@
 
 /**
  * Snapshot of a tested value.
+ * @internal
  */
 class Snapshot
 {
