mmHeap.addAll(Lists.newArrayList(1, 2, 3, 4, 47, 1, 5, 3, 0));
    assertTrue("Heap is not intact initially", mmHeap.isIntact());
    assertEquals(9, mmHeap.size());
    mmHeap.remove(5);
    assertEquals(8, mmHeap.size());
    assertTrue("Heap is not intact after remove()", mmHeap.isIntact());
    assertEquals(47, (int) mmHeap.pollLast());
    assertEquals(4, (int) mmHeap.pollLast());

            assertTrue("Content should be valid", content.length() > 0);
            assertTrue("Should not contain encoding errors", !content.contains("\uFFFD"));

            // Verify JSON structure is intact
            final int openBraces = content.length() - content.replace("{", "").length();
            final int closeBraces = content.length() - content.replace("}", "").length();

  }

  /**
   * Returns a view of a map where each value is transformed by a function. All other properties of
   * the map, such as iteration order, are left intact. For example, the code:
   *
   * {@snippet :
   * Map<String, Integer> map = ImmutableMap.of("a", 4, "b", 9);
   * Function<Integer, Double> sqrt = (Integer in) -> Math.sqrt((int) in);