Yes. See the following examples:
exports.initializer = function(context, callback) { callback(null, ''); };
def my_initializer(context): print("hello world!")
public void my_initializer(Context context) { RuntimeLogger log = context.getLogger(); log.log(String.format("ak:%s", context.getAccessKey())); }
<?php Function my_initializer($context) { echo 'hello world' . PHP_EOL; } ?>