Create a Witness from a Function1
.
Create a Witness from an atomic reference.
A Witness which prints to the console.
Create a Witness which keeps only a java.lang.ref.WeakReference
to u
.
Create a Witness which keeps only a java.lang.ref.WeakReference
to u
.
Var.apply(T, Event[T]) for example.
Create a Witness which keeps only a java.lang.ref.WeakReference
to the Function1
.
Note: There is Java-friendly API for this object: com.twitter.util.Witnesses.