// remove all contained objects.
virtual void clear()
{
while(!objects.empty())
{
#ifdef _DEBUG
Target *obj=objects.begin()->second;
delete obj;
#else
delete objects.begin()->second;
#endif
}
assert(objects.empty());
}
~SoleStore() {
// All objects must have gone from memory or they'll try and remove
// themselves when they are deleted.
assert (objects_.empty());
}