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@@ -46,16 +46,12 @@ components = [
 
 tiltx_s2 = s.elements["stdelem"].surfaces["s2"].rootcoordinatesystem.tiltx
 tiltx_s3 = s.elements["stdelem"].surfaces["s3"].rootcoordinatesystem.tiltx
-tiltx_s3.changetype("pickup",
-                    functionobject=(
-                            FunctionObject("f = lambda x: -x", ["f"]),
-                            "f"),
-                    args=(tiltx_s2,))
+tiltx_s3.to_pickup((FunctionObject("f = lambda x: -x", ["f"]), "f"), (tiltx_s2,))
+
 s.rootcoordinatesystem.update()
 # Setting tiltx of s3 as -tiltx of s2 via pickup and update coordinate systems
 # afterwards.
 
-
 pyrateoptics.listOptimizableVariables(s, max_line_width=75)
 # Lists optimizable variables (the identifiers are keys to a dict which
 # collects them all).