*/
private void openFolder(Node folderNode) {
fireGraphPreEvent();
getEdgeGrouper().handleOpenFolder(folderNode);
AbstractSelectionStrategy preProcessSelection = new SelectNodeAndInnerNodes(this, folderNode);
preProcessSelection.initSelection();
setPreLayoutSelectionStrategy(preProcessSelection);
AbstractSelectionStrategy postProcessSelection = new SelectNode(this, folderNode);
postProcessSelection.initSelection();
setPostLayoutSelectionStrategy(postProcessSelection);