# File lib/rspec/mocks/any_instance/recorder.rb, line 28
        def stub(method_name_or_method_map, &block)
          if method_name_or_method_map.is_a?(Hash)
            method_name_or_method_map.each do |method_name, return_value|
              stub(method_name).and_return(return_value)
            end
          else
            observe!(method_name_or_method_map)
            message_chains.add(method_name_or_method_map, StubChain.new(method_name_or_method_map, &block))
          end
        end