Add a 'Polygon' annotation for a sequence of points.

def addPolygonAnnot(self, points):
        """Add a 'Polygon' annotation for a sequence of points."""
        CheckParent(self)

        val = _fitz.Page_addPolygonAnnot(self, points)

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

        return val