anchor.diff:  
   *Example:* +
   This is the 'src' field for the 'IP' protocol: +
  -the offset within the layer is 16 bytes, and the size of the field is 4 bytes (as defined in the IP spec)
  +The offset within the layer is 16 bytes, and the size of the field is 4 bytes (as defined in the IP spec)
   [source,bash]
   ----
   'dst': [16, 4]
  
positive.code:         "jsonrpc": "2.0",
          "id": "1",
          "method": "supported_methods",
          "params": [""]
  }
  
  'Result':
  
negative.code: 
  === Fields Dictionary
  The fields dictionary contains mapping between a field's name and its regular expression, +
  which has the following structure: +
  (field name, field RegEx) +
  
  Example: this is the Regex for the 'MACField' protocol
  