anchor.diff:  
   This rule uses the Phase Context and is used to specify when a cancellation should occur.
   
  -image::../assets/img/subscriptions/catalog_cancellation_timing.svg[align="center"]
  +image::../assets/img/subscriptions/catalog_cancellation_timing.svg[width=650,align="center"]
   
   //https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/img/catalog/catalog_cancellation_timing.png[width=550,align="center"]
   
  
positive.code: 
  This rule uses the Change Context and, like the cancellation rule above, specifies when a plan change should occur.
  
  image::../assets/img/subscriptions/catalog_change_timing.svg[align="center"]
  
  //https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/img/catalog/catalog_change_timing.png[width=550,align="center"]
  
  
negative.code: 
  === Products
  
  image::../assets/img/subscriptions/catalog_product.svg[float="right"]
  
  //https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/img/catalog/catalog_product.png[width=250,align="center"]
  
  