docs: @Nonnull
    public final HCSWFObject addObjectParam (@Nonnull final String sName, final String sValue)
    {
      if (!JSMarshaller.isJSIdentifier (sName))
        throw new IllegalArgumentException ("The name '" + sName + "' is not a legal JS identifier!");
  
      if (m_aObjectParams == null)
        m_aObjectParams = new CommonsLinkedHashMap <> ();
      m_aObjectParams.put (sName, sValue);
      return this;
    }