RFR: 8266846: Add java.time.InstantSource

[Istvan Neuwirth]

On Thu, 13 May 2021 20:52:33 GMT, Stephen Colebourne <scolebourne at openjdk.org> wrote:

> 8266846: Add java.time.InstantSource

src/java.base/share/classes/java/time/InstantSource.java line 93:

> 91:  * @since 17
> 92:  */
> 93: public interface InstantSource {

Should not we add `@FunctionalInterface`? I can easily imagine this interface being used in tests where we can define the `InstantSource` with lambdas.

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PR: https://git.openjdk.java.net/jdk/pull/4016