bottomAppBarPreference = findPreference(getString(R.string.bottom_app_bar_key));
displayAdditionalAppBarIconsPreference = findPreference(getString(R.string.display_additional_app_bar_icons_key));
appThemePreference = findPreference("app_theme");
bottomAppBarPreference = findPreference(getString(R.string.bottom_app_bar_key));
displayAdditionalAppBarIconsPreference = findPreference(getString(R.string.display_additional_app_bar_icons_key));
appThemePreference = findPreference("app_theme");