@Override
  public void execute(final CBackgroundClickedLeftState<T> state, final MouseEvent event) {
    unselectAll(state.getGraph());
  }
Unselects all nodes in the graph.

@param graph The graph whose nodes are unselected.
java/zylib/src/main/java/com/google/security/zynamics/zylib/gui/zygraph/editmode/actions/CDefaultBackgroundClickedLeftAction.java