getRect method
- Rect rect
 
Returns a lazy iterable of pixels in the rectangle defined by rect.
The returned iterable will contain all pixels in the buffer that are
within the rectangle defined by rect.
The provided rectangle is clamped to the bounds of the buffer and yields no pixels if the rectangle is empty.
Implementation
Iterable<T> getRect(Rect rect) {
  return getRectUnsafe(rect.intersect(bounds));
}