async function f() {
{
  /*0*/await/*1*/using/*2*/b/*3*/=/*4*/f()/*5*/;
}
{
  /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;
}
{
  /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/of/*6*/x/*7*/)/*8*/;
}
{
  /*0*/for/*1*/await/*2*/(/*3*/await/*4*/using/*5*/b/*6*/of/*7*/x/*8*/)/*9*/;
}
}