public void installOn(@NotNull JComponent component) {
    HelpTooltip installed = (HelpTooltip)component.getClientProperty(TOOLTIP_PROPERTY);

    if (installed == null) {
      installImpl(component);
    }
    else if (!equals(installed)) {
      installed.hideAndDispose(component);
      installImpl(component);
    }
  }
public void installOn(@NotNull JComponent component)