# File lib/hashdiff/util.rb, line 118
  def self.custom_compare(method, key, obj1, obj2)
    if method
      res = method.call(key, obj1, obj2)

      # nil != false here
      if res == false
        return [['~', key, obj1, obj2]]
      elsif res == true
        return []
      end
    end
  end