# File lib/eventmachine.rb, line 1312
1312:   def self.error_handler cb = nil, &blk
1313:     if cb or blk
1314:       @error_handler = cb || blk
1315:     elsif instance_variable_defined? :@error_handler
1316:       remove_instance_variable :@error_handler
1317:     end
1318:   end