Call this method after the object is constructed in order to bind all its
handlers. You should never call
#bind() from the constructor
of a non-leaf class since it is meant to be called after the object has
been entirely constructed.
When automatic binding is used (see
HandlerContainerImpl), this will
be called immediately after the object is constructed through Guice/GIN dependency
injection mechanism.
If you are not using automatic binding, or if you later call
#unbind() on this object, you will have to call
#bind()manually.
Multiple call to bind will not fail, the class will be bound once.