NoSuchMethodException

[andrewpedia]

please help with this strange issue

                let x = InvocationArg::try_from("weksdow").unwrap();

                jvm.invoke_static("kotlin.text.StringsKt__IndentKt", "b", &[x]).unwrap();

Caused by: java.lang.NoSuchMethodException: Method b was not found in kotlin.text.StringsKt__IndentKt or its ancestors.

the class code :

.class Lkotlin/text/StringsKt__IndentKt;
.super Lkotlin/text/m;
.source "SourceFile"

.method public static final b(Ljava/lang/String;)Lxn/l;

[andrewpedia]

how can I debug this issue , thanks