Optional

All Known Implementing Classes:

Optional.None, Optional.Some
```
interface Optional<E>
```

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Interface Description
  
  static class Optional.None<E>
  
  static class Optional.Some<E>
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  E get()
  
  boolean isPresent()

- Method Detail
  - get
```
E get()
```
  - isPresent
```
boolean isPresent()
```