public function setDeferredChannel($channel, callable $callback)
	{
		if (isset($this->channels[$channel])) {
			throw new InvalidArgumentException("Channel $channel is already defined");
		}

		$this->deferredChannels[$channel] = $callback;
	}
public function setDeferredChannel($channel, callable $callback)
	{
		if (isset($this->channels[$channel])) {
			throw new InvalidArgumentException("Channel $channel is already defined");
		}

		$this->deferredChannels[$channel] = $callback;
	}
public function setDeferredChannel ( $ channel , callable $ callback ) { if ( isset ( $ this -> channels [ $ channel ] ) ) { throw new InvalidArgumentException ( "Channel $channel is already defined" ) ; } $ this -> deferredChannels [ $ channel ] = $ callback ; }
Define a deferred channel. The callback will be invoked and the return
value passed to setChannel. The return value must implement
Psr\Log\LoggerInterface.

@param string   $channel
@param callable $callback Callback that takes no arguments

@throws InvalidArgumentException If the channel is already defined.
Define a deferred channel . The callback will be invoked and the return value passed to setChannel . The return value must implement Psr \ Log \ LoggerInterface .