jeziellago/channel interfaces.kt

## channel interfaces.kt
interface SendChannel<in E> {
    suspend fun send(element: E)
    fun close(): Boolean
}

interface ReceiveChannel<out E> {
    suspend fun receive(): E
}

interface Channel<E> : SendChannel<E>, ReceiveChannel<E>
	interface SendChannel<in E> {
	suspend fun send(element: E)
	fun close(): Boolean
	}

	interface ReceiveChannel<out E> {
	suspend fun receive(): E
	}

	interface Channel<E> : SendChannel<E>, ReceiveChannel<E>