# File lib/eventmachine.rb, line 900
900:         def self::next_tick pr=nil, &block
901:                 raise "no argument or block given" unless ((pr && pr.respond_to?(:call)) or block)
902:                 (@next_tick_queue ||= []) << ( pr || block )
903:                 EventMachine.signal_loopbreak
904: ??
905:         end