text: /**
   * Merge the node with it's parent (thus : up).
   * Used mostly from the results of a merge from leafs when it result in emptying parent node keys.
   * Parent node is then called for some mergeUp.
   *
   * @returns {Promise<void>}
   */
  const mergeDown = async function () {
    const parent = this.getParent();
    const { childrens, keys, id } = this;
  
    // parent.childrens.splice(selfPos, 1, childrens[0]);
    // console.log(selfPos);
    // console.log(parent.keys);
    // console.log(parent)
  
    // console.log(this)
    // console.log(await parent.getFillStatus())
    console.log('Mergeup');
    throw new Error('Unsupported merge up');
  };
  module.exports = mergeDown;
  