code: public ClassInfoList getInterfacesAndAnnotations() {
          return filter(new ClassInfoFilter() {
              @Override
              public boolean accept(final ClassInfo ci) {
                  return ci.isInterfaceOrAnnotation();
              }
          });
      }
docs: Filter this {@link ClassInfoList} to include only interfaces and annotations (annotations are interfaces, and
  can be implemented). See also {@link #getInterfaces()}.
  
  @return The filtered list, containing only interfaces.