ribbon
constructor(x: Number? = null, ymin: Number? = null, ymax: Number? = null, y: Number? = null, xmin: Number? = null, xmax: Number? = null, size: Number? = null, linetype: Any? = null, color: Any? = null, fill: Any? = null, alpha: Number? = null, colorBy: String? = null, fillBy: String? = null, mapping: RibbonMapping.() -> Unit = {})