use Any
use Boolean
use Option

```doc
# LogicalAnd

Values which wish to implement the `&&` infix operator must implement this protocol.
```
protocol LogicalAnd, as: do
  ```doc
  Should the value be considered `true` for purposes of an `&&` expression?

  Must be implemented.
  ```
  def true?(self: Self): Boolean

  ```doc
  A short-circuiting logical and operation.

  If `LogicalAnd.true?` is true for both the left-hand and right-hand values, the right-hand value is returned.  Otherwise None.
  ```
  def and(self: Self, other: Any): Option, when: true?(self) && true?(other), as: Option.some(other)
  def and(_self: Self, _other: Any): Option, as: Option.none()
end