```
public class ComplementSet<T>
extends java.lang.Object
```
A set that uses complement representation, which is useful when universal set cardinality is unknown. If "isComplement" is set to false, the ComplementSet is the same as a regular Set; if "isComplement" is set to true, the "elements" inside ComplementSet represents the elements that the Set doesn't have.

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addAll(ComplementSet<T> other)`
`void`	`clear()`
`boolean`	`contains(T element)`
`static <T> ComplementSet<T>`	`emptySet()`
`boolean`	`isEmpty()`
`static <T> ComplementSet<T>`	`newSet(ComplementSet<T> other)`
`static <T> ComplementSet<T>`	`newSet(java.util.Collection<T> elements)`	This API will result in copying the data set, which is not performant or GC friendly if it's in critical path.
`static <T> ComplementSet<T>`	`of(T... elements)`
`void`	`removeAll(ComplementSet<T> other)`
`java.lang.String`	`toString()`
`static <T> ComplementSet<T>`	`universalSet()`	Returns a set that contains all possible elements and is represented as a complement of an empty set.
`static <T> ComplementSet<T>`	`wrap(java.util.Set<T> elements)`	This API will reuse the input "elements" which cannot be unmodifiable.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

protected ComplementSet(boolean isComplement,
                        java.util.Set<T> elements)

public static <T> ComplementSet<T> of(T... elements)

public static <T> ComplementSet<T> wrap(java.util.Set<T> elements)

This API will reuse the input "elements" which cannot be unmodifiable.

newSet
```
public static <T> ComplementSet<T> newSet(java.util.Collection<T> elements)
```
This API will result in copying the data set, which is not performant or GC friendly if it's in critical path.

public static <T> ComplementSet<T> newSet(ComplementSet<T> other)

public static <T> ComplementSet<T> emptySet()

universalSet
```
public static <T> ComplementSet<T> universalSet()
```
Returns a set that contains all possible elements and is represented as a complement of an empty set.

public boolean contains(T element)

public void addAll(ComplementSet<T> other)

public void removeAll(ComplementSet<T> other)

Class ComplementSet<T>