@Override
    protected void applyFix(@NotNull Project project, @NotNull PsiElement element, @NotNull ModPsiUpdater updater) {
      if (!(element instanceof PsiLiteralExpression literalExpression)) {
        return;
      }
      final Object literal = literalExpression.getValue();
      if (!(literal instanceof Character)) {
        return;
      }
      final String escaped = StringUtil.escapeStringCharacters(literal.toString());
      PsiReplacementUtil.replaceExpression(literalExpression, '\"' + escaped + '"');
    }
@Override
    protected void applyFix(@NotNull Project project, @NotNull PsiElement element, @NotNull ModPsiUpdater updater)