Add missing chain method to interface

[Jeroen-G]

I was missing the chain method in the Dispatcher interface :)

[taylorotwell]

Can you place it in the correct order?

[Jeroen-G]

It is now alphabetically, what would be the correct order? :)

[rodrigopedra]

what would be the correct order?

I guess the same as the concrete class.

In this case, right before the Dispatcher@hasCommandHandler() method.

framework/src/Illuminate/Contracts/Bus/Dispatcher.php

Lines 35 to 41 in a721a2d

	/**
	* Determine if the given command has a handler.
	*
	* @param mixed $command
	* @return bool
	*/
	public function hasCommandHandler($command);

[Jeroen-G]

Done!