src/vs/workbench/contrib/terminal/browser/terminalGroupService.ts/TerminalGroupService/setActiveGroupToNext
class TerminalGroupService:	setActiveGroupToNext() {
		if (this.groups.length <= 1) {
			return;
		}
		let newIndex = this.activeGroupIndex + 1;
		if (newIndex >= this.groups.length) {
			newIndex = 0;
		}
		this.setActiveGroupByIndex(newIndex);
	}