# File lib/eventmachine.rb, line 939
939:         def self::next_tick pr=nil, &block
940:                 raise "no argument or block given" unless ((pr && pr.respond_to?(:call)) or block)
941:                 (@next_tick_queue ||= []) << ( pr || block )
942:                 EventMachine.signal_loopbreak
943: ??
944:         end