Select Groups

@dale Hi Dale, but how is possible to get a group from grasshopper

import rhinoscriptsyntax as rs
import Rhino
x = rs.coercebrep(x) #x is the group of breps
x = rs.coercebrep(x[0]) #can choose one brep, but how to get the entire group of breps?
BB = x.GetBoundingBox(Rhino.Geometry.Plane.WorldXY)