We can also specify more than one option giving a set of the options. The simplest way of doing that is to use the static of() method of the java.util.Set interface. This way the RETAIN_CLASS_REFERENCE option can be combined with either the SHOW_REFLECT_FRAMES option or the SHOW_HIDDEN_FRAMES option.
Although it is technically possible to combine SHOW_REFLECT_FRAMES and SHOW_HIDDEN_FRAMES as an option set, there is really no advantage in doing that. The latter includes the first, so the combination of the two is exactly same as the second.
