anchor.diff:          - (object)
               - id: *wedding* (string, required) - event guid
               - name: *Bob & Alice Get Hitched*
  -            - starts_at: `2015-11-21@17:54` (string) - commencement time
  -            - ends_at: `2015-11-21@17:54` (string) - termination time
  +            - starts_at: *`2015-11-21@17:54`* (string) - commencement time
  +            - ends_at: *`2015-11-21@17:54`* (string) - termination time
   
   ### Show [GET]
   
  
positive.code: 
  Return an event and all its descendants.
  
  
  
  # Data Structures
  
negative.code: - id: *h9iAjB* (string) - area guid
  - position (position) - in the containing Area
  - size (size) - in the containing Area
  
  # event
  - id: *wedding* (string, required) - event guid
  - name: *Bob & Alice Get Hitched*
  - starts_at: *`2015-11-21@17:54`* (string) - commencement time
  - ends_at: *`2015-11-21@17:54`* (string) - termination time
  - adds (array[child]) - areas that exist for the event
  - parts: toast, dinner, dance
  
  # house_single
  - area
  