_createButton(id, className, label, labelClassName = "vis-label") {
    this.manipulationDOM[id + "Div"] = document.createElement("button");
    this.manipulationDOM[id + "Div"].className = "vis-button " + className;
    this.manipulationDOM[id + "Label"] = document.createElement("div");
    this.manipulationDOM[id + "Label"].className = labelClassName;
    this.manipulationDOM[id + "Label"].innerText = label;
    this.manipulationDOM[id + "Div"].appendChild(
      this.manipulationDOM[id + "Label"]
    );
    return this.manipulationDOM[id + "Div"];
  }
@param {number|string} id
@param {string} className
@param {label} label
@param {string} labelClassName
@returns {HTMLElement}
@private