assembleSemanticsNode method
Assemble the SemanticsNode for this RenderObject.
If isSemanticBoundary is true, this method is called with the node
created for this RenderObject, the config to be applied to that node
and the children SemanticNodes that descendants of this RenderObject
have generated.
By default, the method will annotate node with config and add the
children to it.
Subclasses can override this method to add additional SemanticsNodes to the tree. If new SemanticsNodes are instantiated in this method they must be disposed in clearSemantics.
Implementation
void assembleSemanticsNode(
SemanticsNode node,
SemanticsConfiguration config,
Iterable<SemanticsNode> children,
) {
assert(node == _semantics);
node.updateWith(config: config, childrenInInversePaintOrder: children);
}