anchor.diff:     #:get-physical-device-surface-formats-khr
      #:with-swapchain
      #:get-physical-device-surface-present-modes-khr
  -   #:create-command-pool))
  +   #:create-command-pool
  +   #:create-swapchain-khr
  +   #:destroy-swapchain-khr
  +   #:get-swapchain-images-khr
  +   #:acquire-next-image-khr
  +   #:allocate-command-buffers
  +   #:device-wait-idle
  +   #:destroy-command-pool))
  
positive.code:    #:get-physical-device-wayland-presentation-support-khr
     #:get-physical-device-win32-presentation-support-khr
     #:get-physical-device-xlib-presentation-support-khr
     #:get-physical-device-xcb-presentation-support-khr
     )
    (:export
     #:with-instance
     #:enumerate-physical-devices
     #:get-physical-device-properties
  
negative.code:   (:nicknames :vk)
    (:import-from
     #:%vk
     #:not-ready
     #:timeout
     #:event-set
     #:event-reset
     #:incomplete
     #:suboptimal-khr
     #:error-out-of-host-memory
     #:error-out-of-device-memory
     #:error-initialization-failed
     #:error-device-lost
     #:error-memory-map-failed
     #:error-layer-not-present
     #:error-extension-not-present
     #:error-feature-not-present
     #:error-incompatible-driver
     #:error-too-many-objects
     #:error-format-not-supported
     #:error-surface-lost-khr
     #:error-native-window-in-use-khr
     #:error-out-of-date-khr
     #:error-incompatible-display-khr
     #:error-validation-failed-ext
     #:nv-extension-0-error
     #:nv-extension-1-error
  
     #:device-wait-idle
     #:get-device-proc-addr
     #:get-event-status
     #:get-fence-status
  