code: public static Map<Class<?>, LinkedHashMap<String, Type>> trackRootVariables(final Class type) {
          return trackRootVariables(type, null);
      }
docs: Shortcut for {@link #trackRootVariables(Class, List)} to simplify usage without ignore classes.
  
  @param type class to analyze
  @return resolved generics for all types in class hierarchy with root variables preserved