code: public ClassDoc findClass(String className) {
          final boolean filtered = true;
          for (ClassDocImpl c : getClasses(filtered)) {
              if (c.name().equals(className)) {
                  return c;
              }
          }
          return null;
      }
docs: Lookup for a class within this package.
  
  @return ClassDocImpl of found class, or null if not found.