set collapseIcon(value) {
    if (value) {
      this.setAttribute(attributes.COLLAPSE_ICON, value.toString());
    } else {
      this.removeAttribute(attributes.COLLAPSE_ICON);
    }
    this.#updateNodeAttribute(attributes.COLLAPSE_ICON);
  }
/**
   * Sets the tree group collapse icon
   * @param {string|null} value The icon name
   */
Sets the tree group collapse icon
@param {string|null} value The icon name
Sets the tree group collapse icon @param { string|null } value The icon name
set collapseIcon(value) {
    if (value) {
      this.setAttribute(attributes.COLLAPSE_ICON, value.toString());
    } else {
      this.removeAttribute(attributes.COLLAPSE_ICON);
    }
    this.#updateNodeAttribute(attributes.COLLAPSE_ICON);
  }
set collapseIcon ( value ) { if ( value ) { this . setAttribute ( attributes . COLLAPSE_ICON , value . toString ( ) ) ; } else { this . removeAttribute ( attributes . COLLAPSE_ICON ) ; } this . #updateNodeAttribute ( attributes . COLLAPSE_ICON ) ; }
Sets the tree group collapse icon
 @param {string|null} value The icon name
Sets the tree group collapse icon @param { string|null } value The icon name