anchor.diff:      type: string
       configurable: true
       optional: false
  +    default: '0'
   
   runtime_configs:
     - name: dummy
  
positive.code:     type: string
      configurable: true
      optional: false
    - name: sleep_value
      type: integer
      configurable: true
  
negative.code:         label: Echo Value
          description: 'Configure a value to repeatedly echo'
        - reference: .properties.sleep_value
          label: Sleep Value
          description: 'Time to sleep between echoes'
        - reference: .properties.exit_value
          label: Exit Value
          description: 'Configure a value to echo at exit'
  
  property_blueprints:
  