Function isPortableTextListItemBlock

isPortableTextListItemBlock(
    block:
        | TypedObject
        | PortableTextBlock<
            PortableTextMarkDefinition,
            PortableTextSpan
            | ArbitraryTypedObject,
            string,
            string,
        >,
): block is PortableTextListItemBlock<
    PortableTextMarkDefinition,
    PortableTextSpan,
    string,
    string,
>
Strict check to determine if node is a correctly formatted portable list item block.
Parameters
- block:
      | TypedObject
      | PortableTextBlock<
          PortableTextMarkDefinition,
          PortableTextSpan
          | ArbitraryTypedObject,
          string,
          string,
      >
  Block to check
Returns block is PortableTextListItemBlock<
    PortableTextMarkDefinition,
    PortableTextSpan,
    string,
    string,
>
True if valid Portable Text list item block, otherwise false