Timestamp (identity 20230420 API)

java.lang.Object
- com.android.identity.Timestamp

```
public final class Timestamp
extends java.lang.Object
```
Represents a single instant in time. Ideally, we'd use java.time.Instant, but we cannot do so until we move to API level 26.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object other)`
`int`	`hashCode()`
`static Timestamp`	`now()`
`static Timestamp`	`ofEpochMilli(long epochMillis)`
`long`	`toEpochMilli()`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - now
```
@NonNull
public static Timestamp now()
```
    Returns:
    
    a Timestamp representing the current time
  - ofEpochMilli
```
@NonNull
public static Timestamp ofEpochMilli(long epochMillis)
```
    Parameters:
    
    epochMillis - A time represented as the number of milliseconds since midnight, January 1, 1970 UTC
    
    Returns:
    
    a Timestamp representing the given time
  - toEpochMilli
```
public long toEpochMilli()
```
    Returns:
    
    this represented as the number of milliseconds since midnight, January 1, 1970 UTC
  - toString
```
@NonNull
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object other)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object