class Async::Queue

@yields {|task| ...} When the system is idle, the block will be executed in a new task.
@parameter options [Hash] The options to pass to the task.
@parameter parent [Interface(:async) | Nil] The parent task to use for async operations.
@parameter arguments [Array] The arguments to pass to the block.

@asynchronous Executes the given block concurrently for each item.

Process each item in the queue.

def async(parent: (@parent or Task.current), **options, &block)
	while item = self.dequeue
		parent.async(item, **options, &block)
	end
end