Ticker (caffeine 3.0.6 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 Ticker
```
A time source that returns a time value representing the number of nanoseconds elapsed since some fixed but arbitrary point in time.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`static Ticker`	`disabledTicker()`	Returns a ticker that always returns `0`.
`long`	`read()`	Returns the number of nanoseconds elapsed since this ticker's fixed point of reference.
`static Ticker`	`systemTicker()`	Returns a ticker that reads the current time using `System.nanoTime()`.

- Method Detail
  - read
```
long read()
```
    Returns the number of nanoseconds elapsed since this ticker's fixed point of reference.
    
    Returns:
    
    the number of nanoseconds elapsed since this ticker's fixed point of reference
  - systemTicker
```
static Ticker systemTicker()
```
    Returns a ticker that reads the current time using System.nanoTime().
    
    Returns:
    
    a ticker that reads the current time using System.nanoTime()
  - disabledTicker
```
static Ticker disabledTicker()
```
    Returns a ticker that always returns 0.
    
    Returns:
    
    a ticker that always returns 0