Is it possible to control (e.g. reverse) the nesting hierarchy?

[lwestenberg]

When not using registerNestedElementResolver:

• I make a text selection
• Create a node from that text selection, e.g. MarkNode
• Within that MarkNode I make a text selection
• I create another node, e.g. CustomMarkNode

the nodes are now nested in the order of adding e.g. in the above example it would become:
<Marknode> <CustomMarkNode> </CustomMarkNode> </MarkNode>

Is it possible to control which node becomes the parent and which one becomes the child? In my situation I want to have a specific node type always as the parent.

[moy2010]

Yes. Therer are methods such as isParentRequired and createParentElementNode on the LexicalNode class which you can leverage to achieve the behaviour you want:

/**
   * Whether or not this node has a required parent. Used during copy + paste operations
   * to normalize nodes that would otherwise be orphaned. For example, ListItemNodes without
   * a ListNode parent or TextNodes with a ParagraphNode parent.
   *
   * */
  isParentRequired(): boolean {
    return false;
  }
  
  /**
   * The creation logic for any required parent. Should be implemented if {@link isParentRequired} returns true.
   *
   * */
  createParentElementNode(): ElementNode {
    return $createParagraphNode();
  }