Driving Zone: Germany v1.22.4版本的 MD5 值为：2b6e2d8e8733a3104dcc306c5770286c

以下内容为反编译后的 yn.java 源代码，内容仅作参考

package com.yandex.metrica.impl.ob;

import android.text.TextUtils;
import java.util.UUID;

public class yn implements xn<String> {
    @Override
    public vn a(String str) {
        String str2 = str;
        if (TextUtils.isEmpty(str2)) {
            return vn.a(this, "ApiKey is empty. Please, read official documentation how to obtain one: https://yandex.com/dev/appmetrica/doc/mobile-sdk-dg/concepts/android-initialize.html");
        }
        try {
            UUID.fromString(str2);
            return vn.a(this);
        } catch (Throwable unused) {
            return vn.a(this, "Invalid ApiKey=" + str2 + ". Please, read official documentation how to obtain one: https://yandex.com/dev/appmetrica/doc/mobile-sdk-dg/concepts/android-initialize.html");
        }
    }
}