@Nullable
    @NonNls
    private static String convertExpression(PsiExpression expression, PsiType expectedType) {
      expression = PsiUtil.skipParenthesizedExprDown(expression);
      if (!(expression instanceof PsiLiteralExpression) && !isNegatedLiteral(expression)) {
        return null;
      }
      final PsiType expressionType = expression.getType();
      if (expressionType == null) {
        return null;
      }
      final String text = expression.getText();
      if (expressionType.equals(PsiTypes.intType()) && expectedType.equals(PsiTypes.longType())) {
        return text + 'L';
      }
      if (expressionType.equals(PsiTypes.intType()) && expectedType.equals(PsiTypes.floatType())) {
        if (!isDecimalLiteral(text)) {
          return null;
        }
        return text + ".0F";
      }
      if (expressionType.equals(PsiTypes.intType()) && expectedType.equals(PsiTypes.doubleType())) {
        if (!isDecimalLiteral(text)) {
          return null;
        }
        return text + ".0";
      }
      if (expressionType.equals(PsiTypes.longType()) && expectedType.equals(PsiTypes.floatType())) {
        if (!isDecimalLiteral(text)) {
          return null;
        }
        return text.substring(0, text.length() - 1) + ".0F";
      }
      if (expressionType.equals(PsiTypes.longType()) && expectedType.equals(PsiTypes.doubleType())) {
        if (!isDecimalLiteral(text)) {
          return null;
        }
        return text.substring(0, text.length() - 1) + ".0";
      }
      if (expressionType.equals(PsiTypes.doubleType()) && expectedType.equals(PsiTypes.floatType())) {
        final int length = text.length();
        if (text.charAt(length - 1) == 'd' || text.charAt(length - 1) == 'D') {
          return text.substring(0, length - 1) + 'F';
        }
        else {
          return text + 'F';
        }
      }
      if (expressionType.equals(PsiTypes.floatType()) && expectedType.equals(PsiTypes.doubleType())) {
        final int length = text.length();
        return text.substring(0, length - 1);
      }
      return null;
    }
@Nullable
    @NonNls
    private static String convertExpression(PsiExpression expression, PsiType expectedType)