public void ForIn()
{
ParseAndWalk("for(var m in c);");
ParseAndWalk("for(m in c)f();");
ParseAndWalk("for(m in c){f1();f2();}");
ParseAndWalk("for(m in c){if(a)break;if(b)next;f();}");
ParseAndWalk("for(m1 in c1) for(m2 in c2) f();");
ParseAndWalk("for(m1 in c1) { for(m2 in c2) f(); }");
}