code: @Nonnull
    public CSSImportRule setLocation (@Nonnull final CSSURI aLocation)
    {
      ValueEnforcer.notNull (aLocation, "Location");
  
      m_aLocation = aLocation;
      return this;
    }
docs: Set the URI of the file to be imported.
  
  @param aLocation
  The location to use. May not be <code>null</code>.
  @return this;