case 22: test.removeAll(" a"); break;
case 23: test.removeAll(new UnicodeSet("[\\ a]")); break;
case 24: test.retain(' '); break;
case 25: test.retain(' ','a'); break;
case 26: test.retain(" "); break;
case 27: test.retainAll(" a"); break;
case 28: test.retainAll(new UnicodeSet("[\\ a]")); break;
case 29: test.set(0,1); break;
case 30: test.set(new UnicodeSet("[ab]")); break;
default: continue main; // so we don't keep having to change the endpoint, and gaps are not skipped.