. "Each of the two-argument functions in the VIA-LAYOUT family of functions (called VIA-LAYOUT0 and VIA-LAYOUT1) create a new node and a composition of two modifiable wires and one non modifiable wire such that the nonmodifiable wire makes a connection, called a via, to a designated one of two numbered layers (0 or 1) of the printed circuit board, silicon wafer, or other substrate." . . . .