Can anyone explain where value is passed from in create functions?

[Augs0]

Hello!
I am currently trying to create a custom Blot in version 2 that involves a container. I have seen in the Code Block blot that there is a create function in the container class that expects a value. Whenever I try to mimic this type of structure, the value expected is coming through as undefined.

Here is the code I am referring to in Code Block as an example:

 static create(value: string) {
    const domNode = super.create(value) as Element;
    domNode.setAttribute('spellcheck', 'false');
    return domNode;
  }

The value referred to in static create is always undefined for me whenever I try to use create in a container. Can anyone explain where this value is passed from and / or why it may come through as undefined?

For a fleshed out example of this structure working successfully, I also found another Quill user who created a custom Quote blot that uses this structure and that value argument. Here is their code which also uses this structure: https://codesandbox.io/p/sandbox/quill-multiline-block-quote-3jqpy5?file=%2Fsrc%2FCustomQuoteBlot.mjs%3A24%2C2-40%2C4

This is also done in the Medium walkthrough in the docs e.g. in the Link Blot

class LinkBlot extends Inline {
  static blotName = 'link';
  static tagName = 'a';
// where is this value from???
  static create(value) {
    const node = super.create();
    node.setAttribute('href', value);
    node.setAttribute('target', '_blank');
    return node;
  }

  static formats(node) {
    return node.getAttribute('href');
  }
}