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This operator is responsible for creating a mirror of the entire BlockSurface branch, including the BlockSurface object, the collection, and its objects. It will mirror it on the corresponding axis (X, Y or Z), depending on the button that was pressed.
Steps to follow:
Select an object in the collections that correspond to the branches that you want to mirror.
Press the "Mirror Branch" button to create a mirror of the BlockSurface object, the collection, and its objects. The axis will be X, Y, or Z depending on the button that is pressed.
All branches, BlockSurface, and objects in the collections where the selected objects were will be duplicated.