code: public ClassInfoList getImplementedInterfaces() {
          return filter(new ClassInfoFilter() {
              @Override
              public boolean accept(final ClassInfo ci) {
                  return ci.isImplementedInterface();
              }
          });
      }
docs: Filter this {@link ClassInfoList} to include only implemented interfaces, i.e. non-annotation interfaces, or
  annotations that have been implemented by a class.
  
  @return The filtered list, containing only implemented interfaces.