chore(spanner): debug flakiness

Author: harshachinta

google-cloud-spanner/src/main/java/com/google/cloud/spanner/Mutation.java

@@ -419,7 +419,7 @@ static com.google.spanner.v1.Mutation toProtoGetRandomMutation(
     com.google.spanner.v1.Mutation.Write.Builder write = null;
     com.google.spanner.v1.KeySet.Builder keySet = null;
 
-    // Store all the mutations exclusing INSERT.
+    // Store all the mutations excluding INSERT.
     List<com.google.spanner.v1.Mutation> allMutationsExcludingInsert = new ArrayList<>();
     // Stores INSERT mutation with large number of values.
     com.google.spanner.v1.Mutation largeInsertMutation =
@@ -503,6 +503,9 @@ static com.google.spanner.v1.Mutation toProtoGetRandomMutation(
       }
     }
 
+    System.out.println("Printing");
+    System.out.println(allMutationsExcludingInsert);
+    System.out.println(largeInsertMutation);
     // Select a random mutation based on the heuristic.
     if (allMutationsExcludingInsert.size() > 0) {
       int randomIndex = ThreadLocalRandom.current().nextInt(allMutationsExcludingInsert.size());