call method
Produces a FragmentMorphic containing children.
Children follow the same normalization rules as ElementBuilder: strings become TextMorphic, numbers become TextMorphic, Morphic nodes are included as-is, and nested Iterables are flattened.
Implementation
FragmentMorphic call([List<dynamic>? children]) {
final normalized = _normalizeChildren(children ?? const []);
return FragmentMorphic(children: normalized, key: key);
}