Widget personalization

I believe that's the object selector.

You can see how we use this in the Kentico Community Portal to let us personalize based on the badges assigned to a member.

[ObjectSelectorComponent(
    MemberBadgeInfo.OBJECT_TYPE,
    Label = "Member badges",
    ExplanationText = "Members only need to have at least 1 of the selected badges.",
    Order = 0,
    MaximumItems = 0)]
public IEnumerable<ObjectRelatedItem> SelectedMemberBadges { get; set; } = [];