content: // home screen
  const String KEY_BOTTOM_NAVIGATION = "movies_bottom_navigation";
  const String KEY_BOTTOM_NAVIGATION_NOW_PLAYING = "movies_bottom_navigation_now_playing";
  const String KEY_BOTTOM_NAVIGATION_UP_COMING = "movies_bottom_navigation_up_coming";
  const String KEY_BOTTOM_NAVIGATION_POPULAR = "movies_bottom_navigation_popular";
  const String KEY_BOTTOM_NAVIGATION_TOP = "movies_bottom_navigation_top";
  const String KEY_BOTTOM_NAVIGATION_ABOUT = "movies_bottom_navigation_about";
  
  // detail screen
  const String KEY_TAP_ITEM_FAVORITE = "tap_item_favorire";
  const String KEY_TAP_BACK_BUTTON = "tap_item_back";
  
  // now playing screen
  const String KEY_LIST_VIEW_NOW_PLAYING = "listview_menu_now_playing";
  const String KEY_TAP_ITEM_NOW_PLAYING = "tap_movies_338762";
  
  // up coming screen
  const String KEY_LIST_VIEW_UP_COMING = "listview_menu_up_coming";
  const String KEY_TAP_ITEM_UP_COMING = "tap_movies_514847";
  
  // popular screen
  const String KEY_LIST_VIEW_POPULAR = "listview_menu_popular";
  const String KEY_TAP_ITEM_POPULAR = "tap_movies_419704";
  
  // top rated screen
  const String KEY_LIST_VIEW_TOP = "listview_menu_top";
  const String KEY_TAP_ITEM_TOP = "tap_movies_640344";
  
  // about screen