Separate stub Magisk Manager to a module

app/src/main/java/a/w.java

@@ -0,0 +1,42 @@
+package a;
+
+import android.content.Context;
+
+import com.topjohnwu.magisk.components.DelegateWorker;
+
+import java.lang.reflect.ParameterizedType;
+
+import androidx.annotation.NonNull;
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+
+public abstract class w<T extends DelegateWorker> extends Worker {
+
+    /* Wrapper class to workaround Proguard -keep class * extends Worker */
+
+    private T base;
+
+    @SuppressWarnings("unchecked")
+    w(@NonNull Context context, @NonNull WorkerParameters workerParams) {
+        super(context, workerParams);
+        try {
+            base = ((Class<T>) ((ParameterizedType) getClass().getGenericSuperclass())
+                    .getActualTypeArguments()[0]).newInstance();
+            base.setActualWorker(this);
+        } catch (Exception ignored) {}
+    }
+
+    @NonNull
+    @Override
+    public Result doWork() {
+        if (base == null)
+            return Result.failure();
+        return base.doWork();
+    }
+
+    @Override
+    public void onStopped() {
+        if (base != null)
+            base.onStopped();
+    }
+}