How can I return list of strings form custom function and after present that in UI

// Automatic FlutterFlow imports
import '/backend/backend.dart';
import '/backend/schema/structs/index.dart';
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/actions/index.dart'; // Imports other custom actions
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom action code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!

// Set your action name, define your arguments and return parameter,
// and then add the boilerplate code using the green button on the right!
import 'dart:convert';

Future<List<String>> extractSubjects(String content) async {
  try {
    // Directly parse the content, assuming it's a JSON string.
    var contentJson = jsonDecode(content);

    // Extract subjects, with null safety.
    String subject1 = contentJson['subject1'] ?? 'No data for subject 1';
    String subject2 = contentJson['subject2'] ?? 'No data for subject 2';
    String subject3 = contentJson['subject3'] ?? 'No data for subject 3';

    // Return the subjects as a list.
    return [subject1, subject2, subject3];
  } catch (e) {
    // In case of error, return a list with error message or empty strings.
    return ['Error parsing content', '', ''];
  }
}