anchor.diff:             :c-array-dimensions
              :c-array-total-size
              :c-array-element-type
  -           :c-array-element-type
              :c-array-element-byte-size
              :c-array-free
              :c-array-row-byte-size
  
positive.code:            :buffer-stream-p
             :buffer-stream-vao
             :buffer-stream-length
             :buffer-stream-base-vertex
             :buffer-stream-index-type
             :buffer-stream-gpu-arrays
  
negative.code:            :c-array-dimensions
             :c-array-total-size
             :c-array-element-type
             :c-array-element-byte-size
             :clone-c-array
             :free-c-array
             :make-c-array
  