never access parent filed directly
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@ -98,7 +98,7 @@ function hash(G::DirectProductGroup, h::UInt)
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end
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function hash(g::DirectProductGroupElem, h::UInt)
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return hash(g.elts, hash(g.parent, hash(DirectProductGroupElem, h)))
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return hash(g.elts, hash(parent(g), hash(DirectProductGroupElem, h)))
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end
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doc"""
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