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-rw-r--r--test/psych/visitors/test_yaml_tree.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/psych/visitors/test_yaml_tree.rb b/test/psych/visitors/test_yaml_tree.rb
index 6a9dbc1..4c48670 100644
--- a/test/psych/visitors/test_yaml_tree.rb
+++ b/test/psych/visitors/test_yaml_tree.rb
@@ -1,5 +1,6 @@
# frozen_string_literal: true
require 'psych/helper'
+require 'delegate'
module Psych
module Visitors