visitElementBefore method
Called when an Element has been reached, before its children have been visited.
Implementation
@override
void visitElementBefore(md.Element element) {
final label = element.textContent;
final children = element.children;
if (children == null ||
children.length == 1 && children.single is md.Text) {
return;
}
// flutter_markdown_plus replaces only the first parsed inline child with
// a custom builder result. Flatten labels such as `prompt_input.dart`
// first so emphasis-like fragments cannot remain beside the file chip.
children
..clear()
..add(md.Text(label));
}