anchor.diff:     #:mysql-command-init
      #:mysql-has-capability
      #:mysql-has-some-capability
  -   #:mysql-connection-has-capability
      #:mysql-connection-has-some-capability
      #:mysql-connection-stream
      #:mysql-current-command-p
  
positive.code:    #:unexpected-packet
     #:value-is-not-decimal
     #:invalid-date-time
  
     ;; Opaque Structures
     #:mysql-connection
  
negative.code:    ;; Connections
     #:mysql-connect
     #:mysql-disconnect
     #:mysql-connection-has-status
     #:mysql-connection-has-capability
     ;; Basic Commands
     #:mysql-query
     ;; Basic Response Packet Types / Accessors
  