Method in IContentSaliencyStrategy
Chooses an item from content that is the most appropriate (or salient ) for the user's current context.
Implementations of this method should not modify any state
that is, they should be 'read-only' operations. If a strategy needs to record information about when a piece of content has been selected, it should do it in the ContentWasSelected(ContentSaliencyOption) method.
System.Collections.Generic.IEnumerable<Yarn.Saliency.ContentSaliencyOption> content
A collection of content items. This collection may be empty.
An item from content that is the most appropriate for display, or null if no content should be displayed.