code: public void put(String subscript, Object value) {
          if (value == null) {
              values.remove(subscript);
          } else {
              values.put(subscript, value);
          }
      }
docs: Adds (or removes) a vector value at the specified subscript.
  
  @param subscript Subscript specifier
  @param value Value (if null, any existing value is removed).