describeElements static method
Returns a list of Elements from the current build context to the error report.
Implementation
static DiagnosticsNode describeElements(String name, Iterable<Element> elements) {
  return DiagnosticsBlock(
    name: name,
    children: elements
        .map<DiagnosticsNode>((Element element) => DiagnosticsProperty<Element>('', element))
        .toList(),
    allowTruncate: true,
  );
}