Switch from direct continuation with then() to dataflow()
Switch from direct continuation with then() to dataflow()

ddemidov/amgcl,huahbo/amgcl,dondieselkopf/amgcl,ddemidov/amgcl,ddemidov/amgcl,dondieselkopf/amgcl,ddemidov/amgcl,dondieselkopf/amgcl,huahbo/amgcl,huahbo/amgcl