Error in the "plotting theta=zero" line
x_theta, y_theta = zero_theta_line(data)
Error is ```---> 62 map_wcs = wcs.WCS(gz3d.maps['spx_ellcoo_elliptical_azimuth'].header, naxis=2)
Marvin says ```AttributeError: 'Map' object has no 'header' member```
Presumably another change in Marvin.
Error in the "plotting theta=zero" line
x_theta, y_theta = zero_theta_line(data)Error is ```---> 62 map_wcs = wcs.WCS(gz3d.maps['spx_ellcoo_elliptical_azimuth'].header, naxis=2)