private static void print_impl(final int i, final long K, final Object V) {
    String p = (V instanceof Prime) ? "prime_" : "";
    Object V2 = Prime.unbox(V);
    String VS = (V2 == TOMBSTONE) ? "tombstone" : V2.toString();
    System.out.println("["+i+"]=("+K+","+p+VS+")");
  }
Verbose printout of table internals, useful for debugging.
jctools-core/src/main/java/org/jctools/maps/NonBlockingHashMapLong.java