the method name
a #GCallback to be called to invoke method @name of @jsc_class
user data to pass to @callback
destroy notifier for @user_data
the #GType of the method return value, or %G_TYPE_NONE if the method is void.
a list of #GType<!-- -->s, one for each parameter, or %NULL
Add method with @name to @jsc_class. When the method is called by JavaScript or jsc_value_object_invoke_method(), @callback is called receiving the class instance as first parameter, followed by the method parameters and then @user_data as last parameter. When the method is cleared in the #JSCClass context, @destroy_notify is called with @user_data as parameter.
Note that the value returned by @callback must be transfer full. In case of non-refcounted boxed types, you should use %G_TYPE_POINTER instead of the actual boxed #GType to ensure that the instance owned by #JSCClass is used. If you really want to return a new copy of the boxed type, use #JSC_TYPE_VALUE and return a #JSCValue created with jsc_value_new_object() that receives the copy as the instance parameter.