This observable update refers to inclusion operations that add new elements to collection classes .
Class Location describes locations in messages implemented by
class
Class Message represents messages that are issued by observable
collection classes whenever a data structure is changed .
trait
Message[+A] extends AnyRef
This observable update refers to removal operations of elements from collection classes .
This command refers to reset operations .
Objects of this class represent compound messages consisting of a sequence of other messages .
Classes that mix in the Scriptable class allow messages to be sent to objects of that class .
This observable update refers to destructive modification operations of elements from collection classes .