import groovy.transform.Field
@Field String test = "abc";

println "Script: ${test}";
fun()

def fun() {
    println "Function: ${test}";
    def run = new Runnable() {
        void run() {
            println "Runnable0: ${test}";
            def test = test
            new Runnable() {
                void run() {
                    println "Runnable1: ${test}";
                }
            }.run();
        }
    }.run();
}