Add a 'rubber stamp' in a rectangle.

def addStampAnnot(self, rect, stamp=0):
        """Add a 'rubber stamp' in a rectangle."""
        CheckParent(self)

        val = _fitz.Page_addStampAnnot(self, rect, stamp)

        if not val: return
        val.thisown = True
        val.parent = weakref.proxy(self)
        self._annot_refs[id(val)] = val

        return val