# File lib/mongoid/errors/mixed_relations.rb, line 25
      def initialize(root_klass, embedded_klass)
        @root_klass, @embedded_klass = root_klass, embedded_klass

        super(
          translate(
            "mixed_relations",
            { :root => root_klass, :embedded => embedded_klass }
          )
        )
      end