public override void OnInspectorGUI()
{
serializedObject.Update();
// Before we clear the popup list, let's quickly store the current key in case we
// need to do a lookup (on language change).
var lastKey = availableKeys[currentIndex.intValue];
RefreshCurrentLanguage();
// If we switcharooed the language, let's try to find the same key that we had selected
// before. Otherwise, reset to 0.
var newIndex = availableKeys.FindIndex(str => str.Equals(lastKey));
currentIndex.intValue = newIndex >= 0 ? newIndex : 0;
// Display the current language that is chosen.
GUILayout.BeginHorizontal();
EditorGUILayout.LabelField("Current language:");
EditorGUILayout.LabelField(currentLangName, EditorStyles.boldLabel);
GUILayout.EndHorizontal();
// Display a popup for the user to select a valid string in the current language.
GUILayout.BeginHorizontal();
EditorGUILayout.LabelField("Localized key to use: ");
currentIndex.intValue = EditorGUILayout.Popup(currentIndex.intValue, availableKeys.ToArray());
GUILayout.EndHorizontal();
// Set the string value of the text component to the localized string.
text.stringValue = LanguageLoader.GetLocalizedString(availableKeys[currentIndex.intValue]);
serializedObject.ApplyModifiedProperties();
}