Add an `.Artist` to the container box.
(self, a)
| 849 | self.ref_offset_transform = mtransforms.Affine2D() |
| 850 | |
| 851 | def add_artist(self, a): |
| 852 | """Add an `.Artist` to the container box.""" |
| 853 | self._children.append(a) |
| 854 | a.set_transform(self.get_transform()) |
| 855 | self.stale = True |
| 856 | |
| 857 | def get_transform(self): |
| 858 | """Return the `.Transform` applied to the children.""" |