code: public void setDetailsFont(String font_family, int font_size) {
          this.detailsLabel
                  .setStyle("-fx-font-family: \"" + font_family + "\";"
                          + "-fx-font-size:" + Integer.toString(font_size) + "px;");
      }
docs: Sets both details label's font family and size.
  
  @param font_family Font family in <code>Strings</code>
  @param font_size Font size in <code>integer</code> (pixels)