title: Proguard Interface class which has another interface inside
body: <p>I have an Interface class A and in the Class A i have another Interface B 
  I am trying to proguard the Package and  when i build it in gradle I getting </p>
  
  <p>The below error </p>
  
  <pre><code>symbol:   class B
    location: interface A
  ../Progaurd/android/trunk/sample/module-c/src/main/java/com/c/db/C.java:24: error: cannot find symbol
  public class C implements B 
  </code></pre>
  
  <p>The actual class is as follows</p>
  
  <pre><code>public interface A{
         public interface B{
           ...
         }
  }
  </code></pre>
  
  <p>I have tried with the below lines in proguard-project.txt file</p>
  
  <pre><code>-keep class * implements com.sample.manager.storage.A.B
  </code></pre>
  
  <p>Please help me....</p>