code: @Nonnull
    public CSSReaderSettings setCSSVersion (@Nonnull final ECSSVersion eCSSVersion)
    {
      ValueEnforcer.notNull (eCSSVersion, "CSSVersion");
      m_eCSSVersion = eCSSVersion;
      return this;
    }
docs: Set the CSS version to be read.
  
  @param eCSSVersion
  The version number to use. May not be <code>null</code>.
  @return this