anchor.diff:             #:marshall-rpc-call
              #:unmarshall-rpc-call
   
  +           #:rpc-error
              #:rpc-error-p
              #:rpc-error-message
              #:rpc-error-code
  
positive.code:            #:remote-warning
             #:remote-warning-msg
             #:remote-warning-code
             #:remote-error-type
             #:remote-error-msg
             #:remote-error-code
  
negative.code:            #:remote-warning
             #:remote-warning-msg
             #:remote-warning-code
             #:remote-error
             #:remote-error-type
             #:remote-error-msg
             #:remote-error-code
  