Use model.component(<ctag>).geom(<tag>).create(<ftag>,"Thicken2D") to create a thicken feature tagged <ftag> in the 2D geometry sequence with the tag <tag>.

Use model.component(<ctag>).geom(<tag>).feature(<ftag>).selection("input") to select the entities to thicken. To set the selection level for the selection object, and to select the input entities see Geometry Object Selection Methods. For example, use model.component(<ctag>).geom(<tag>).feature(<ftag>).selection("input").init(1) to set the selection to be a selection of boundaries (geometric entities of dimension 1) for the thicken feature with the tag <ftag> in the 2D geometry sequence with the tag <tag>.

 Offset, Thicken