err := p.AddAsynchronousMessage().
		Given("Event is received").
		ExpectsToReceive("Event").
		UsingPlugin(message.PluginConfig{
			Plugin:  "protobuf",
			Version: "0.3.4",
		}).
		WithContents(protoMessage, "application/protobuf").
		WithMetadata(headers).
		ExecuteTest(t, func(m message.AsynchronousMessage) error {
			return nil
		})

p.AddAsynchronousMessage().Given("Event is received").ExpectsToReceive("Evenr").UsingPlugin((message.PluginConfig literal)).WithContents(protoMessage, "application/protobuf").WithMetadata undefined (type *v4.AsynchronousMessageWithPluginContents has no field or method WithMetadata)