private static void reportStubTreeHashCollision(@NotNull SerializedStubTree newTree,
                                                  @NotNull SerializedStubTree existingTree) {
    String oldTreeDump = "\nexisting tree " + dumpStub(existingTree);
    String newTreeDump = "\nnew tree " + dumpStub(newTree);
    byte[] hash = newTree.getTreeHash();
    LOG.info("Stub tree hashing collision. " +
             "Different trees have the same hash = " + StringUtil.toHexString(hash) + ". " +
             oldTreeDump + newTreeDump, new Exception());
  }
private static void reportStubTreeHashCollision(@NotNull SerializedStubTree newTree,
                                                  @NotNull SerializedStubTree existingTree)