Espresso (espresso 0.3.1 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface Espresso
```
The core function of Espresso. It take a request object and returns a response.

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Interface Description
  
  static interface Espresso.Async
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Response call(Request request)

- Method Detail
  - call
```
Response call(Request request)
```