getParentChain method
Returns JSON representing the chain of DiagnosticsNode instances from
root of the tree to the Element or RenderObject matching id
.
The JSON contains all information required to display a tree view with all nodes other than nodes along the path collapsed.
Implementation
@protected
String getParentChain(String id, String groupName) {
return _safeJsonEncode(_getParentChain(id, groupName));
}