Guessing? https://metacpan.org/release/Tk/source/pTk/ptkCanvGroup.c#L178 CreateGroup -- * * This procedure is invoked to create a new rectangle * or oval item in a canvas. *

In reply to Re^2: Tk::Canvas createGroup() Undocumented by Anonymous Monk
in thread Tk::Canvas createGroup() Undocumented by kcott

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