code: function wrapChildrenInDefaultBlock(
      opts: Options,
      change: Change,
      node: Node
  ): Change {
      change.wrapBlockByKey(node.nodes.first().key, opts.typeDefault, {
          normalize: false
      });
  
      const wrapper = change.value.document.getDescendant(node.key).nodes.first();
  
      // Add in the remaining items
      node.nodes.rest().forEach((child, index) =>
          change.moveNodeByKey(child.key, wrapper.key, index + 1, {
              normalize: false
          })
      );
  
      return change;
  }
docs: Wraps all child of a node in the default block type.
  Returns a change, for chaining purposes