static <A> void forEach_pcall(Iterable<A> l, IVF1<A> f) {
  if (f != null && l != null) for (A a : l)
    pcallF(f, a);
}

static <A> void lambdaMapLike forEach_pcall(IVF1<A> f, Iterable<A> l) {
  forEach_pcall(l, f);
}

static <A> void forEach_pcall(A[] l, IVF1<A> f) {
  if (f != null && l != null) for (A a : l)
    pcallF(f, a);
}

Began life as a copy of #1022895