Ungroups the objects under a group node.
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Ungroup objects under one of the following:
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Puts all objects under their lowest common parent in the hierarchy. If there is none, then it puts the objects as the world
level.
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Puts all objects at world level (at the top-level of the hierarchy).
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When on, Maya preserves the transformation information of the group. If off, the ungrouped objects lose their grouped transformation
attributes, therefore changing their position when ungrouped.
