newBitWidth(bitWidth) {
        for (let tunnel of this.scope.tunnelList[this.identifier]) {
            if (tunnel.fixedBitWidth) continue;
            if (tunnel.bitWidth === undefined) continue;
            if (tunnel.bitWidth < 1) continue;
            tunnel.bitWidth = bitWidth;
            for (let i = 0; i < tunnel.nodeList.length; i++) { tunnel.nodeList[i].bitWidth = bitWidth; }
        }
    }
Overridden from CircuitElement. Sets all paired tunnels' bitwidths for syncronization
@param {number} bitWidth - bitwidth to set to