It's acceptable for implementation classes to be written to fit into existing code, but new classes must not instantiate managed properties or implement getters manually.

This is preferred:

```groovy
public interface NewThing {
    Property<String> getSomeProperty()
}
```

This is acceptable:

```groovy
public interface NewThing {

    } catch (ClassCastException acceptable) {
      // allowed by the spec
    }
  }

  public void testContainsEntryWithIncomparableValue() {
    try {
      assertFalse(getMap().entrySet().contains(mapEntry(k0(), IncomparableType.INSTANCE)));
    } catch (ClassCastException acceptable) {
      // allowed by the spec
    }
  }

    } catch (ClassCastException acceptable) {
      // allowed by the spec
    }
  }

  public void testContainsEntryWithIncomparableValue() {
    try {
      assertFalse(getMap().entrySet().contains(mapEntry(k0(), IncomparableType.INSTANCE)));
    } catch (ClassCastException acceptable) {
      // allowed by the spec
    }
  }

* Other conduct which could reasonably be considered inappropriate in a
  professional setting

## Enforcement Responsibilities

Community leaders are responsible for clarifying and enforcing our standards of
acceptable behavior and will take appropriate and fair corrective action in
response to any behavior that they deem inappropriate, threatening, offensive,
or harmful.

   * escaping for code points if required.
   *
   * <p>Note that arrays returned by this method must not be modified once they have been returned.
   * However it is acceptable to return the same array multiple times (even for different input
   * characters).
   *
   * @param cp the Unicode code point to escape
   * @return the replacement characters, or {@code null} if no escaping was required

  }

  void expectSetCountFailure(SortedMultiset<E> multiset, Entry<E> entry) {
    try {
      multiset.setCount(entry.getElement(), multiset.count(entry.getElement()));
    } catch (IllegalArgumentException acceptable) {
    }
    try {
      multiset.setCount(entry.getElement(), multiset.count(entry.getElement()) + 1);
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }

      return;
    }

    if (targetException == null) {
      fail("Target failed to throw " + referenceException);
    }

    /*
     * Reference iterator threw an exception, so we should expect an acceptable
     * exception from the target.
     */
    referenceException.assertPermitted(targetException);
  }

  private static final IteratorOperation REMOVE_METHOD =
      new IteratorOperation() {

   *
   * <p>Changes in the underlying map are reflected in this view. Conversely, this view supports
   * removal operations, and these are reflected in the underlying map.
   *
   * <p>It's acceptable for the underlying map to contain null keys, and even null values provided
   * that the function is capable of accepting null input. The transformed map might contain null

   *
   * <p>Changes in the underlying map are reflected in this view. Conversely, this view supports
   * removal operations, and these are reflected in the underlying map.
   *
   * <p>It's acceptable for the underlying map to contain null keys, and even null values provided
   * that the function is capable of accepting null input. The transformed map might contain null

      return;
    }

    if (targetException == null) {
      fail("Target failed to throw " + referenceException);
    }

    /*
     * Reference iterator threw an exception, so we should expect an acceptable
     * exception from the target.
     */
    referenceException.assertPermitted(targetException);
  }

  private static final IteratorOperation REMOVE_METHOD =
      new IteratorOperation() {