No input, just an output since this attribute is
only getable. What MUI returns when generating a
BoopsiObject is a standard MUI object, not a pointer
to the Boopsi gadget itself. In case you really need
this Boopsi gadget pointer, you can obtain it by getting
MUIA_Boopsi_Object from the MUI object.
Since MUI passes along every unknown attribute to the
boopsi gadget, there should be no need for this tag anyway.
Note that the boopsi object pointer is only valid when the
window is open!