fix missing borrowed helper method

resources/defaults.rb

@@ -9,6 +9,31 @@ property :settings, Hash
 property :system, [true, false]
 property :user, String
 
+action_class do
+  def convert_to_string_from_data_type(value)
+    case value
+    when Array
+      "-array #{value.map { |x| convert_to_string_from_data_type(x) }.join(' ')}"
+    when Integer
+      "-integer #{value}"
+    when FalseClass
+      "-bool #{value}"
+    when TrueClass
+      "-bool #{value}"
+    when Hash
+      "-dict #{value.map do |k, v|
+                 Shellwords.shellescape(k) + ' ' + convert_to_string_from_data_type(v)
+               end.join(' ')}"
+    when String
+      "-string #{Shellwords.shellescape(value)}"
+    when Float
+      "-float #{value}"
+    else
+      raise "Unknown or unsupported data type: #{value} of #{value.class}"
+    end
+  end
+end
+
 action :run do
   new_resource.option = 'read' if new_resource.read_only
   new_resource.settings.each do |setting, value|