To improve code reuse, we need a mechanism for extracting common logic from sprites. This becomes challenging when the shared logic relies on a sprite's specific fields or methods.

For instance:

A.spx

var (
  count int
)

func increase() {
  count++
}

B.spx

var (
  count int
)

func increase() {
  count++
}

Currently, there's no good way to extract logic dependent on the count field or increase method for A & B.