def demo_mirrorFeatures_add(rootComp: adsk.fusion.Design.rootComponent): body = _ui.selectEntity('Select the body to mirror', 'Bodies').entity bodies = adsk.core.ObjectCollection.create() bodies.add(body) mirrorFeatures = rootComp.features.mirrorFeatures mirrorPlane = rootComp.xYConstructionPlane mirrorInput = mirrorFeatures.createInput(bodies, mirrorPlane) mirrorFeature = mirrorFeatures.add(mirrorInput)