code: def get_required_outputs():
      """Iterates through the required outputs and collapses to the right format
  
      Returns:
          set: Set of required output services and names in the form service:name
      """
      return {
          "{}:{}".format(service, output)
          for service, value in REQUIRED_OUTPUTS.items()
          for output in value
      }
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_required_outputs() and returns: unknown