src/vs/base/browser/ui/progressbar/progressbar.ts/ProgressBar/infinite
class ProgressBar:	infinite(): ProgressBar {
		this.bit.style.width = '2%';
		this.bit.style.opacity = '1';

		this.element.classList.remove(CSS_DISCRETE, CSS_DONE, CSS_INFINITE_LONG_RUNNING);
		this.element.classList.add(CSS_ACTIVE, CSS_INFINITE);

		this.longRunningScheduler.schedule();

		return this;
	}