public override CharInfo GetCharInfoAt(int column) =>
 CollapseLineTraits.GetCharInfoAt(column, textBeforeCollapse, textAfterCollapse, RenderedText, Index, collapseRepresentation);
 public override IReadOnlyList <string> GetStringContents() =>
 CollapseLineTraits.GetStringContents(textBeforeCollapse, textAfterCollapse, collapsedContent);