code: public boolean removeValue(String name, V value) {
          List<V> lo = get(name);
          if ((lo == null) || (lo.isEmpty())) {
              return false;
          }
          boolean ret = lo.remove(value);
          if (lo.isEmpty()) {
              remove(name);
          } else {
              put(name, lo);
          }
          return ret;
      }
docs: Remove value.
  
  @param name  The entry key.
  @param value The entry value.
  @return true if it was removed.