private CharSequence css(final String id, final Element svg) {
    Throwing.Function<String, Tuple<Tuple<Number, String>, Tuple<Number, String>>> viewBox = Throwing
        .<String, Tuple<Tuple<Number, String>, Tuple<Number, String>>>throwingFunction(name -> {
          String vbox = svg.attr(name);
          String[] dimension = vbox.split("\\s+");
          return new Tuple(parse(dimension[2]), parse(dimension[_3]));
        }).memoized();
    Tuple<Number, String> w = Optional.ofNullable(Strings.emptyToNull(svg.attr("width")))
        .map(this::parse)
        .orElseGet(() -> viewBox.apply("viewBox")._1);
    Tuple<Number, String> h = Optional.ofNullable(Strings.emptyToNull(svg.attr("height")))
        .map(this::parse)
        .orElseGet(() -> viewBox.apply("viewBox")._2);
    StringBuilder css = new StringBuilder();
    css.append(get("css.prefix").toString()).append(".").append(id)
        .append(" {\n  width: ").append(w._1).append(w._2).append(";\n")
        .append("  height: ").append(h._1).append(h._2).append(";\n}");
    return css;
  }
private CharSequence css(final String id, final Element svg) {
    Throwing.Function<String, Tuple<Tuple<Number, String>, Tuple<Number, String>>> viewBox = Throwing
        .<String, Tuple<Tuple<Number, String>, Tuple<Number, String>>>throwingFunction(name -> {
          String vbox = svg.attr(name);
          String[] dimension = vbox.split("\\s+");
          return new Tuple(parse(dimension[2]), parse(dimension[_3]));
        }).memoized();
    Tuple<Number, String> w = Optional.ofNullable(Strings.emptyToNull(svg.attr("width")))
        .map(this::parse)
        .orElseGet(() -> viewBox.apply("viewBox")._1);
    Tuple<Number, String> h = Optional.ofNullable(Strings.emptyToNull(svg.attr("height")))
        .map(this::parse)
        .orElseGet(() -> viewBox.apply("viewBox")._2);
    StringBuilder css = new StringBuilder();
    css.append(get("css.prefix").toString()).append(".").append(id)
        .append(" {\n  width: ").append(w._1).append(w._2).append(";\n")
        .append("  height: ").append(h._1).append(h._2).append(";\n}");
    return css;
  }
private CharSequence css ( final String id , final Element svg ) { Throwing . Function < String , Tuple < Tuple < Number , String > , Tuple < Number , String > > > viewBox = Throwing . < String , Tuple < Tuple < Number , String > , Tuple < Number , String > > > throwingFunction ( name -> { String vbox = svg . attr ( name ) ; String [ ] dimension = vbox . split ( "\\s+" ) ; return new Tuple ( parse ( dimension [ 2 ] ) , parse ( dimension [ _3 ] ) ) ; } ) . memoized ( ) ; Tuple < Number , String > w = Optional . ofNullable ( Strings . emptyToNull ( svg . attr ( "width" ) ) ) . map ( this :: parse ) . orElseGet ( ( ) -> viewBox . apply ( "viewBox" ) . _1 ) ; Tuple < Number , String > h = Optional . ofNullable ( Strings . emptyToNull ( svg . attr ( "height" ) ) ) . map ( this :: parse ) . orElseGet ( ( ) -> viewBox . apply ( "viewBox" ) . _2 ) ; StringBuilder css = new StringBuilder ( ) ; css . append ( get ( "css.prefix" ) . toString ( ) ) . append ( "." ) . append ( id ) . append ( " {\n  width: " ) . append ( w . _1 ) . append ( w . _2 ) . append ( ";\n" ) . append ( "  height: " ) . append ( h . _1 ) . append ( h . _2 ) . append ( ";\n}" ) ; return css ; }
Generate a CSS rule, it reads the width and height attributes of the svg element or fallback to
viewBox attribute.

@param id  ID to use.
@param svg Svg element to convert.
@return A css rule.
Generate a CSS rule it reads the width and height attributes of the svg element or fallback to viewBox attribute .