# File lib/safe_yaml/transform/transformation_map.rb, line 29
        def set_predefined_values(predefined_values)
          if SafeYAML::YAML_ENGINE == "syck"
            expanded_map = predefined_values.inject({}) do |hash, (key, value)|
              hash[key] = value
              hash[key.capitalize] = value
              hash[key.upcase] = value
              hash
            end
          else
            expanded_map = CaseAgnosticMap.new
            expanded_map.merge!(predefined_values)
          end

          self.const_set(:PREDEFINED_VALUES, expanded_map.freeze)
        end