TokenMap

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 TokenMap<T>
```
Maps a Token to a an object of type T, or null if the token isn't recognized.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T map(Token token)
  Transforms token to an instance of T.

- Method Detail
  - map
```
T map(Token token)
```
    Transforms token to an instance of T. null is returned if the token isn't recognized.