# File lib/eventmachine.rb, line 1372
1372:   def self.error_handler cb = nil, &blk
1373:     if cb or blk
1374:       @error_handler = cb || blk
1375:     elsif instance_variable_defined? :@error_handler
1376:       remove_instance_variable :@error_handler
1377:     end
1378:   end