static S renderMemoryPoolSizes() {
  new L<S> lines;
  long totalCommitted = 0;
  for (MemoryPoolMXBean b : ManagementFactory.getMemoryPoolMXBeans()) {
    long committed = b.getUsage().getCommitted();
    lines.add(padLeft(str(toK(committed)), 7) + "K committed: " +  b.getName() + ": " + b.getUsage());
    totalCommitted += committed;
  }
  lines.add("");
  lines.add("Total committed memory: " + toK(totalCommitted) + "K");
  ret lines(lines);
}

Began life as a copy of #1009123