# File lib/mongoid/relations/options.rb, line 33
      def validate!(options)
        valid_options = options[:relation].valid_options.concat(COMMON)
        options.keys.each do |key|
          if !valid_options.include?(key)
            raise Errors::InvalidOptions.new(
              options[:name],
              key,
              valid_options
            )
          end
        end
      end