Function program 

pub fn program(source: &str) -> String

An editor script as a program for the ScriptHost. A module (a line starting import or export) runs as written. Anything else is a classic editor body: it runs with cad.document (the history snapshot with addFeature(type, params, persistentData), updateFeature(id, params) (a merge, as feature_set_params merges) and deleteFeature(id)), cad.selection, cad.brep (every app tool) and ui.notify; the document commands apply in order after it returns, and a returned value prints as Result:. The body may await.