QuestionBox.view
    [ QuestionBox.markdown "**WOW**, great component!"
    ]

This is the default type of question box. It doesn't have a programmatic or direct visual relationship to any piece of content.

This type of QuestionBox has an arrow pointing to the relevant part of the question.

Typically, you would use this type of QuestionBox type with a Block.

This type of QuestionBox is only rendered after measurements of the DOM are made.

Tessa does not know when it's appropriate to use this type of QuestionBox -- sorry!

Initially, the anchored box will be rendered in the "Measuring" state.

While in the Measuring state, the anchored box will have visibility hidden. This will cause the box to take up vertical space but not show to the user until measurements have been taken.t

Decodes JSON in the format:

{
    "anchors" = [ { "x" = 1.2, "y" = .3, "width" = 300.0, "height" = 325.5 } ],
    "container" = { "x" = 1.2, "y" = .3, "width" = 300.0, "height" = 325.5 },
    "box" = { "x" = 1.2, "y" = .3, "width" = 300.0, "height" = 325.5 }
}

Produces an AnchoredBoxMeasurement for use with anchoredTo