code: private void jButtonRemoveActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_jButtonRemoveActionPerformed
      {//GEN-HEADEREND:event_jButtonRemoveActionPerformed
          TreePath[] paths = jTreeGraph2.getSelectionPaths();
          if (paths != null) {
              removeItemFromComposite(paths);
          }
      }
docs: GEN-LAST:event_jButtonAddActionPerformed