code: public List<ProgramElementDoc> getMembersFor(ClassDoc cd) {
          ClassMembers clmembers = classMap.get(cd);
          if (clmembers == null) {
              return new ArrayList<>();
          }
          return clmembers.getMembers();
      }
docs: Retrn the list of members for the given class.
  
  @param cd the class to retrieve the list of visible members for.
  
  @return the list of members for the given class.