Backport PR #22306 on branch v3.5.x (FIX: ensure that used sub-packages are actually imported) - #22307

Backport PR #22306 on branch v3.5.x (FIX: ensure that used sub-packages are actually imported)#22307

QuLogic merged 1 commit into

matplotlib:v3.5.xmatplotlib/matplotlib:v3.5.xfrom

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