1. In an electronic device, a method comprising the steps of: providing a graphical model of a dynamic system in a graphical modeling environment that uses information in the graphical model to simulate behavior of the dynamic system over a specified period of time; grouping a first data signal of a first signal type and a second data signal of a second signal type to form a bus signal in the graphical model, the first signal type differing from the second signal type in at least one of data type or complexity; providing the bus signal as input to a non-virtual operation block; and performing an operation on the bus signal with the non-virtual operation block.