In the following example:
<Progress multi className="class-a">
<Progress bar value={25} className="class-b" />
<Progress bar value={25} className="class-c" />
</Progress>
class-a is added to the outer div, but class-b and class-c are not added to bar divs.
In the following example:
class-ais added to the outer div, butclass-bandclass-care not added to bar divs.