Can you list different types of Publishers used in the Combine framework?

In the Combine framework (Apple), there are several main types of Publisher used for creating and managing data streams:

• Just — publishes a single value and then completes.

• Empty — publishes no values and immediately completes.

• Fail — immediately completes with an error.

• Future — publishes a single value or error in the future, asynchronously.

• PassthroughSubject — allows manual sending of values to subscribers, does not store the last value.

• CurrentValueSubject — similar to PassthroughSubject, but stores the current value and sends it to new subscribers.

• Timer.TimerPublisher — publishes values at specified time intervals.

• NotificationCenter.Publisher — publishes notifications from NotificationCenter.

Example of using PassthroughSubject:

import Combine

let subject = PassthroughSubject<String, Never>()

let subscription = subject.sink { value in
    print("Received value: \(value)")
}

subject.send("Hello")
subject.send("Combine")