Sends a message to the running program: update decides what it means in the state it finds. Running it needs
no services and completes synchronously, whatever runs it: it only hands the message to the run, which handles
it in its own fiber, with the services and the scheduler it started with. A renderer whose handlers are plain
callbacks runs it at once with Effect.runSync, or with a runtime of its own.
Sends a message to the running program:
updatedecides what it means in the state it finds. Running it needs no services and completes synchronously, whatever runs it: it only hands the message to the run, which handles it in its own fiber, with the services and the scheduler it started with. A renderer whose handlers are plain callbacks runs it at once withEffect.runSync, or with a runtime of its own.