public BindingSet<T> activate() {
        return new BindingSet<>(bindings.entrySet());
    }
<p>Creates and returns an immutable {@link BindingSet} that contains the bindings of this BindingRepository.
Notice that the BindingSet uses a snapshot of the current bindings so that this repository remains mutable and
reusable.</p>

@return The created BindingSet instance.
jdisc_core/src/main/java/com/yahoo/jdisc/application/BindingRepository.java