.TRANSFORM.Fluid.Pipes.Examples.TransportDelayPipeTests.Test1_MultiSpeciesMultiTrace.Medium .TRANSFORM.Fluid.Pipes.Examples.TransportDelayPipeTests.Test1_MultiSpeciesMultiTrace.Mediumpackage Medium = Modelica.Media.IdealGases.MixtureGases.SimpleNaturalGas(extraPropertiesNames = {"A", "B"});