code: function WidgetButton() {
          this.addOutput("", LiteGraph.EVENT);
          this.addOutput("", "boolean");
          this.addProperty("text", "click me");
          this.addProperty("font_size", 30);
          this.addProperty("message", "");
          this.size = [164, 84];
          this.clicked = false;
      }
docs: /* Button ***************