func (rulesMap RulesMap) Add(rulesMap2 RulesMap) {
	for eventName, rules := range rulesMap2 {
		rulesMap[eventName] = rules.Union(rulesMap[eventName])
	}
}

// Remove - removes given rules map.
func (rulesMap RulesMap) Remove(rulesMap2 RulesMap) {
	for eventName, rules := range rulesMap {
		if nr := rules.Difference(rulesMap2[eventName]); len(nr) != 0 {
			rulesMap[eventName] = nr
		} else {

            var dependencyElements = dependencies.children("dependency").toList();
            assertEquals(1, dependencyElements.size(), "Should have only one dependency after duplicate removal");
        }

        @Test
        @DisplayName("should remove duplicate dependencies in regular dependencies")
        void shouldRemoveDuplicateDependenciesInRegularDependencies() throws Exception {
            String pomXml = """

    }

    @Override
    public boolean remove(@Nullable Object o) {
      try {
        return super.remove(o);
      } catch (UnsupportedOperationException e) {
        for (Entry<K, V> entry : map().entrySet()) {
          if (Objects.equals(o, entry.getValue())) {
            map().remove(entry.getKey());
            return true;
          }
        }

    assertEquals(asList("5", "2", "3", "4", "6"), toList);
    fromList.remove(Integer.valueOf(2));
    assertEquals(asList("5", "3", "4", "6"), toList);
    fromList.remove(2);
    assertEquals(asList("5", "3", "6"), toList);

    /* toList modifications reflected in fromList */
    toList.remove(2);
    assertEquals(asList(5, 3), fromList);
    toList.remove("5");
    assertEquals(asList(3), fromList);
    toList.clear();

Started: 1 minute ago
```

Once it is **Complete**

```
λ mc admin decommission status alias/ http://minio{1...2}/data{1...4}
Decommission of pool http://minio{1...2}/data{1...4} is complete, you may now remove it from server command line
```

### A pool not under decommissioning will throw an error

```
λ mc admin decommission status alias/ http://minio{1...2}/data{1...4}

        return delegate().iterator();
      }

      @Override
      public int size() {
        return delegate().size();
      }

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

      @Override
      public void clear() {
        delegate().clear();
      }
    };
  }

  @Override
  public @Nullable Entry<K, V> firstEntry() {

    throw new UnsupportedOperationException();
  }

  @CanIgnoreReturnValue
  @Override
  public final boolean remove(@Nullable Object element) {
    return remove(element, 1) > 0;
  }

  @CanIgnoreReturnValue
  @Override
  public int remove(@Nullable Object element, int occurrences) {
    throw new UnsupportedOperationException();
  }

  @CanIgnoreReturnValue
  @Override

    Set<E> elementSet = getMultiset().elementSet();
    assertTrue(elementSet.remove(e0()));
    assertEmpty(getMultiset());
    assertEquals(expectedSize, getMultiset().size());
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetRemoveAbsent() {
    Set<E> elementSet = getMultiset().elementSet();
    assertFalse(elementSet.remove(e3()));
    expectUnchanged();
  }

        if (cycle != null) {
            // remove edge which introduced cycle
            removeEdge(from, to);
            throw new CycleDetectedException(
                    "Edge between '" + from.label + "' and '" + to.label + "' introduces to cycle in the graph", cycle);
        }
    }

    void removeEdge(Vertex from, Vertex to) {
        from.children.remove(to);
        to.parents.remove(from);
    }

    assertTrue(result.remove(v0()));
    assertFalse(multimap().containsEntry(k0(), v0()));
    assertEquals(2, multimap().size());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testPropagatesRemoveLastElementToMultimap() {
    Collection<V> result = multimap().asMap().get(k0());
    assertTrue(result.remove(v0()));
    assertGet(k0());
  }