static @Nullable String getKeyValueLocationString(@NotNull YAMLKeyValue kv) {
    YAMLValue value = kv.getValue();
    if (value instanceof YAMLScalar) {
      return kv.getValueText();
    }
    else if (value instanceof YAMLAlias) {
      return YAMLStructureViewFactory.getAliasPresentableText((YAMLAlias)value);
    }
    else {
      return null;
    }
  }
static @Nullable String getKeyValueLocationString(@NotNull YAMLKeyValue kv)