setAllChildren(key, value, checkAlive, checkVisible, operation, force)
Quickly set the same property across all children of this group, and any child Groups, to a new value. If this group contains other Groups then the same property is set across their children as well, iterating down until it reaches the bottom.Unlike with setAll the property is NOT set on child Groups itself. The operation parameter controls how the new value is assigned to the property, from simple replacement to addition