[Doc]: QuadContourSet does not contain a collections attribute like stated in the manual #29575

Documentation Link

https://matplotlib.org/stable/api/contour_api.html#matplotlib.contour.QuadContourSet
https://matplotlib.org/devdocs/api/contour_api.html

Problem

• Version 3.10.0
• The QuadContourSet does not contain a collections attribute like the documentation says it should. Could someone verify whether this is a code issue or a documentation issue? I must admit I don't fully understand what is supposed to happen...
• Also ax seems to have been renamed to axes.
• Code sample: (contours is the QuadContourSet object)
  MN = np.linspace(0, 2, 20)
  alt = np.linspace(0, 16000, 20)
  EAS = np.outer(MN, alt).transpose()
  levels=[100, 400]
  contours = plt.contour(MN, alt, EAS, levels, colors='k', linewidths=0.5)

Suggested improvement

• Change documentation of QuadContourSet to reflect the correct atributes contained.