metaClass.getMetaMethod doesn't find method with Class as an argument

class A {
    // cannot be found by getMetaMethod
    def met1(Class clazz) {
        println clazz.name
    }

    // a workaround
    def met2(List<Class> clazz) {
        println clazz.get(0).name
    }
}

A.metaClass.invokeMethod = { name, args ->
    def metaMethod = delegate.metaClass.getMetaMethod(name, args)
    if (metaMethod) {
        metaMethod.invoke(delegate, args)
    } else {
        println "Method $name not found on $delegate"
    }
}

def a = new A()
a.met1(A) // prints Method met1 not found on A@1c804...
a.met2([A]) // prints A