public void doubleClick(DoubleClickEvent event) {
RepositoryTreeNode node = (RepositoryTreeNode) ((IStructuredSelection) branchTree
.getSelection()).getFirstElement();
if (node == null)
return;
final RepositoryTreeNodeType type = node.getType();
if (type != RepositoryTreeNodeType.REF
&& type != RepositoryTreeNodeType.TAG
&& type != RepositoryTreeNodeType.ADDITIONALREF)
branchTree.setExpandedState(node,
!branchTree.getExpandedState(node));