Sending an Image with No Text

Is it possible to send an image from the bot with no text and/or change the ordering of image and text in the dialog? When I run rasa visualize, I receive the following error:

Could not load domain due to: 'Utter template 'utter_cheer_up' needs to contain either '- text: ' or '- custom: ' attribute to be a proper template.'. To specify a valid domain path use the '--domain' argument.

As an example from the default project:

  - image: ""

The working version is:

  - text: "Here is something to cheer you up:"
    image: ""