Create an object of type Choice4 having the default value. Use the optionally specified basicAllocator to supply memory. If basicAllocator is 0, the currently installed default allocator is used.
Choice4
basicAllocator
Declared in <balb_testmessages.h>
<balb_testmessages.h>
explicit Choice4(bslma::Allocator* basicAllocator = 0);