### Question:
SidebarSheet { protected void unselect() { getButton().removeStyleName(LinkkiApplicationTheme.SIDEBAR_SELECTED); getContent().setVisible(false); } @Deprecated  SidebarSheet(Resource icon, Component content, String tooltip);  SidebarSheet(Resource icon, String name, Component content);  SidebarSheet(Resource icon, String name, Component content, UiUpdateObserver uiUpdateObserver);  SidebarSheet(Resource icon, String name, Supplier<Component> contentSupplier);  SidebarSheet(Resource icon, String name, Supplier<Component> contentSupplier,
            @CheckForNull UiUpdateObserver uiUpdateObserver);  SidebarSheet(String id, Resource icon, String name, Component content, UiUpdateObserver uiUpdateObserver);  SidebarSheet(String id, Resource icon, String name, Component content);  SidebarSheet(String id, Resource icon, String name, Supplier<Component> contentSupplier);  SidebarSheet(String id, Resource icon, String name, Supplier<Component> contentSupplier,
            @CheckForNull UiUpdateObserver uiUpdateObserver); String getId(); Button getButton(); Component getContent(); String getName(); Optional<UiUpdateObserver> getUiUpdateObserver(); void setUiUpdateObserver(@CheckForNull UiUpdateObserver uiUpdateObserver); @Override String toString();  }### Answer:
@Test public void testUnselect_checkVisibilitySetToFalse() { HorizontalLayout content = new HorizontalLayout(); SidebarSheet sheet = createSideBarSheet(content); sheet.unselect(); assertThat(content.isVisible(), is(false)); }