use Any
use Boolean
use LogicalNot

```doc
# Equality

Values which wish to implement the `==` infix operator must implement this protocol.
```
protocol Equality, as: do
  ```doc
  Compare `self` and `other`, returning `true` when the values are equal.
  ```
  def equal?(self: Self, other: Any): Boolean

  ```doc
  Compare `self` and `other`, returning `true` when the values are not equal.
  ```
  def not_equal?(self: Self, other: Any): Boolean, as: LogicalNot.not(Equality.equal?(self, other))
end