exception.expect(ClUnsupportedOperationException.class);
        exception.expectMessage(is("remove"));
        final Vector<String> vector = new Vector<String>();
        vector.add("a");
        final EnumerationIterator<String> itr = new EnumerationIterator<String>(vector.elements());
        itr.remove();
    }

    /**
     * @throws Exception
     */
    @Test

    }

    /**
     * Unregister a resource
     *
     * @param resourceId the resource ID
     */
    public void unregisterResource(String resourceId) {
        ResourceHolder holder = activeResources.remove(resourceId);
        if (holder != null) {
            if (!holder.closed) {
                holder.closed = true;
                totalReleased.incrementAndGet();
            }

        }
        final Class<?> result = clazz;
        clazz = clazz.getSuperclass();
        return result;
    }

    @Override
    public void remove() {
        throw new ClUnsupportedOperationException("remove");
    }

     */
    @Override
    public void close() {
        // nothing to clean up
        this.next = null;
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("remove");
    }

        }

        @Override
        public boolean add(final E e) {
            return parent.add(e);
        }

        @Override
        public boolean remove(final Object o) {
            return parent.remove(o);
        }

        @Override
        public boolean containsAll(final Collection<?> c) {
            return parent.containsAll(c);
        }

        @Override

            }
            final int style = STYLES[index++];
            return DateFormat.getDateInstance(style, locale);
        }

        @Override
        public void remove() {
            throw new ClUnsupportedOperationException("remove");
        }

    }

    /**
     * {@link Iterator} that iterates over {@link DateFormat}s corresponding to the styles held by the locale.
     *
     * @author koichik

    }

    /**
     * @throws Exception
     */
    @Test
    public void testRemove() throws Exception {
        assertThat(map.remove("ONE"), is("1"));
        assertThat(map.size(), is(1));
        assertThat(map.remove("dummy"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPutAll() throws Exception {

        assertArgumentNotNull("enumeration", enumeration);
        this.enumeration = enumeration;
    }

    @Override
    public void remove() {
        throw new ClUnsupportedOperationException("remove");
    }

    @Override
    public boolean hasNext() {
        return enumeration.hasMoreElements();
    }

    @Override
    public T next() {

        if (c != null) {
            childUrlSet.addAll(c);
        }
    }

    /**
     * Remove a child URL.
     * @param url the request data to remove from the child URL set
     */
    public void removeUrl(final RequestData url) {
        childUrlSet.remove(url);
    }

    /**
     * Get the transformer name.
     * @return transformer
     */

        // Assert
        verify(tree, times(1)).release(); // release called in finally exactly once
    }

    @Test
    @DisplayName("remove() throws UnsupportedOperationException with 'remove' message")
    void removeUnsupported() throws Exception {
        // Arrange
        stubAcquireReturnsSelf();