setupParentData method
Implementation
@override
void setupParentData(RenderObject child) {
if (child.parentData is! ExpansionTileParentData) {
child.parentData = ExpansionTileParentData();
}
}
@override
void setupParentData(RenderObject child) {
if (child.parentData is! ExpansionTileParentData) {
child.parentData = ExpansionTileParentData();
}
}