fill method
- E fill, [
- Rect? bounds
Fills the grid with the given element.
If bounds is provided, only the elements within the bounds are filled.
Implementation
void fill(E fill, [Rect? bounds]) {
  if (bounds == null) {
    bounds = this.bounds;
  } else {
    bounds = bounds.intersect(this.bounds);
  }
  fillRect(bounds, setUnsafe, fill);
}