The string used to ellipsize overflowing text. Setting this to a non-empty string will cause this string to be substituted for the remaining text if the text can not fit within the specified maximum width.
Specifically, the ellipsis is applied to the last line before the line truncated by maxLines, if maxLines is non-null and that line overflows the width constraint, or to the first line that is wider than the width constraint, if maxLines is null. The width constraint is the maxWidth.
final String? ellipsis;