Optional
contentIf you want your highlight to store content after being a GhostHighlight, you should create your own interface extended off this. If you are currently using this property to determine what kind of highlight to render, please use type.
Optional
typeThis property is planned to be non-optional in future.
This represents a selected (text/mouse) area that has been turned into a highlight. If you are storing highlights, they should be stored as this type.