chapter04 cluster_Nodes cluster_Scope1_0 cluster_Scope1_1 Start2 Start $ctrl arg Con_5 12 Con_6 1 Return7 Return Return7->Start2:p0 0 Return7->Con_6 1 Scope1_0 0 $ctrl arg Scope1_0:Scope1_0_arg->Start2:p1 Scope1_1 1 a Scope1_1:Scope1_1_a->Con_5