code: @Nonnull
    public CSSMediaRule addMediaQuery (@Nonnull @Nonempty final CSSMediaQuery aMediaQuery)
    {
      ValueEnforcer.notNull (aMediaQuery, "MediaQuery");
  
      m_aMediaQueries.add (aMediaQuery);
      return this;
    }
docs: Add a new media query.
  
  @param aMediaQuery
  The media query to be added. May not be <code>null</code>.
  @return this for chaining