assertTrue("heap does not contain sergey", mmHeap.contains("sergey"));
    assertTrue("Could not remove larry", mmHeap.removeAll(Lists.newArrayList("sergey", "eric")));
    assertFalse("Could remove nikesh which is not in the heap", mmHeap.remove("nikesh"));
    assertEquals(4, mmHeap.size());
  }

  public void testCreateWithOrdering() {
    MinMaxPriorityQueue<String> mmHeap =

    assertTrue("heap does not contain sergey", mmHeap.contains("sergey"));
    assertTrue("Could not remove larry", mmHeap.removeAll(Lists.newArrayList("sergey", "eric")));
    assertFalse("Could remove nikesh which is not in the heap", mmHeap.remove("nikesh"));
    assertEquals(4, mmHeap.size());
  }

  public void testCreateWithOrdering() {
    MinMaxPriorityQueue<String> mmHeap =

    }

    private static char[] nines() {
      char[] nines = new char[ZEROES.length()];
      for (int i = 0; i < ZEROES.length(); i++) {
        nines[i] = (char) (ZEROES.charAt(i) + 9);
      }
      return nines;
    }

    static final CharMatcher INSTANCE = new Digit();

    private Digit() {
      super("CharMatcher.digit()", zeroes(), nines());
    }
  }

    }

    private static char[] nines() {
      char[] nines = new char[ZEROES.length()];
      for (int i = 0; i < ZEROES.length(); i++) {
        nines[i] = (char) (ZEROES.charAt(i) + 9);
      }
      return nines;
    }

    static final CharMatcher INSTANCE = new Digit();

    private Digit() {
      super("CharMatcher.digit()", zeroes(), nines());
    }
  }

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GOEXPERIMENT=cgocheck2 at build time.

It is possible to defeat this enforcement by using the unsafe package,
and of course there is nothing stopping the C code from doing anything
it likes. However, programs that break these rules are likely to fail
in unexpected and unpredictable ways.

The type [runtime/cgo.Handle] can be used to safely pass Go values
between Go and C.