docs: public static String getRemoteInterfaceName(String stubClassName) {
          if (stubClassName != null && stubClassName.endsWith("_Stub") &&
              !stubClassName.endsWith("._Stub")) // PM25511
          {
              StringBuilder nameBuilder = new StringBuilder(stubClassName);
              nameBuilder.setLength(nameBuilder.length() - 5);
  
              int packageOffset = nameBuilder.lastIndexOf(".") + 1;
              if (nameBuilder.charAt(packageOffset) == '_')
                  nameBuilder.deleteCharAt(packageOffset);
              else
                  return null;
  
              return nameBuilder.toString();
          }
  
          return null;
      }