Multiply two ZerosAndPoles transfer functions (zp1 * zp2)
encapsulated operator function '*' import Modelica; import ZerosAndPoles = Modelica_LinearSystems2.WorkInProgress.DiscreteZerosAndPoles; input ZerosAndPoles zp1; input ZerosAndPoles zp2; output ZerosAndPoles result "= zp1 * zp2"; end '*';