toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
  String linksCsv = (links == null) ? '' : links!.join(', ');
  return 'SectionModel{documentID: $documentID, title: $title, description: $description, image: $image, imagePositionRelative: $imagePositionRelative, imageAlignment: $imageAlignment, imageWidth: $imageWidth, links: Link[] { $linksCsv }}';
}