Allow stacktrace inspection in debug mode

Signed-off-by: TheSilkMiner <thesilkminer@outlook.com>

Author: TheSilkMiner

ScriptingExample/src/test/java/org/openzen/zenscript/scriptingexample/tests/actual_test/java_native/FunctionalInterfaceTests.java

@@ -29,7 +29,7 @@ public List<String> getRequiredStdLibModules() {
 	@Test
 	void testFunctionalInterface() {
 		addScript(
-				"var modified = modifyString('test', (strings, context) => { return strings; });\n" +
+				"var modified = modifyString('test', (strings, context) => { return straightUpItself(strings); });\n" +
 						"println(modified.length);",
 				"FunctionalInterfaceTests_testFunctionalInterface.zs");
 
@@ -44,7 +44,7 @@ void testFunctionalInterface() {
 	@Test
 	void testBiFunction() {
 		addScript(
-				"var modified = stringFunction('test', (strings, context) => {return strings;});\n" +
+				"var modified = stringFunction('test', (strings, context) => { return straightUpItself(strings); });\n" +
 						"println(modified.length);",
 				"FunctionalInterfaceTests_testBiFunction.zs");
 
@@ -67,6 +67,11 @@ public static List<String> modifyString(String baseString, StringModifier modifi
 		public static List<String> stringFunction(String baseString, BiFunction<List<String>, Boolean, List<String>> function) {
 			return function.apply(Collections.singletonList(baseString), false);
 		}
+
+		@ZenCodeGlobals.Global
+		public static List<String> straightUpItself(List<String> list) {
+			return list;
+		}
 	}
 
 	@FunctionalInterface