RelativeClock (Flink : Core 2.2.0 API)

All Known Implementing Classes:

Clock, ManualClock, SystemClock
```
@PublicEvolving
public interface RelativeClock
```
A clock that gives access to relative time, similar to System#nanoTime(), however the progress of the relative time doesn't have to reflect the progress of a wall clock. Concrete classes can specify a different contract in that regard. Returned time must be monotonically increasing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`relativeTimeMillis()`	Gets the current relative time, in milliseconds.
`long`	`relativeTimeNanos()`	Gets the current relative time, in nanoseconds.

- Method Detail
  - relativeTimeMillis
```
long relativeTimeMillis()
```
    Gets the current relative time, in milliseconds.
  - relativeTimeNanos
```
long relativeTimeNanos()
```
    Gets the current relative time, in nanoseconds.