code: public XSS css(final CssStringEscapeType type, final CssStringEscapeLevel level) {
      this.csslevel = requireNonNull(level, "Level required.");
      this.csstype = requireNonNull(type, "Type required.");
      return this;
    }
docs: Set CSS escape type and level.
  
  @param type Type.
  @param level Level.
  @return This module.