Resolve "Group node: set inverted -> add node"

Closes #39 (closed)

changed milestone to %v0.2

added bug label

assigned to @u.eisenbarth

added 1 commit

• ae99572b - Group::add_node: return error is group is inverted.

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added 1 commit

• 279b923c - Group:connect_nodes: return error if inverted.

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added 1 commit

• 466b426c - Update documentation.

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marked this merge request as ready

merged

mentioned in commit 750e6f32