of method
Returns the RenderAbstractViewport that most tightly encloses the given render object.
If the object does not have a RenderAbstractViewport as an ancestor, this function returns null.
Implementation
static RenderAbstractViewport of(RenderObject object) {
while (object != null) {
if (object is RenderAbstractViewport)
return object;
object = object.parent;
}
return null;
}