A list in which the user can expand a single item to view item details. See also the MultiListInlay variant.

By default, this control expects items to be a dictionary of the form:

{
    description: (content, usually a single line, that's always visible)
    content: (expanded content that appears when an item is selected)
}

This control implements the List Inlay user interface pattern discussed in the book "Designing Interfaces". This control was also the subject of a user interface blog post.