# Channel

**Interface**

```php
 /**
  * @param mixed $message
  * @return Generator
  *
  * This function is used to send a message to the channel.
  */
 public function sendGen($message): Generator;

 /**
  * @param mixed $message
  * @return void
  *
  * This function is used to send a message to the channel.
  */
 public function send($message): void;

 /**
  * @param callable $callback
  * @return Generator
  *
  * This function is used to receive a message from the channel.
  */
 public function receiveGen(callable $callback): Generator;

 /**
  * @param callable $callback
  * @return void
  *
  * This function is used to receive a message from the channel.
  */
 public function receive(callable $callback): void;

 /**
  * @return bool
  *
  * This function is used to check if the channel is empty.
  */
 public function isEmpty(): bool;

 /**
  * @return void
  *
  * This function is used to close the channel.
  */
 public function close(): void;

 /**
  * @return bool
  *
  * This function is used to check if the channel is closed.
  */
 public function isClosed(): bool;
```


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