Class that makes a get request to an API then parses the data into a Array<String> object but not sure how I return this object.

how_do_i_return_an_array.swift

import Foundation

class AppUtils {
    
    // Mark: Static class variables
    static let requestBaseUrlString = "http://123.456.7.8:9999/"
    
    
    // Mark: Get expirations for symbol
    static func getExpirations(for symbol: String) {
        
        // full get request url string
        let requestUrlString = requestBaseUrlString + symbol
        
        // submit get request
        let request = URLSession.shared.dataTask(with: URL(string: requestUrlString)!) { (data, response, error) in
            
            // make sure request returns data and has no errors
            guard let data = data, error == nil else {
                print("Get request for getExpirations for: '\(symbol)' returned an error.!")
            
                return
            }
            
            // parse the get request data expirations
            do {
                let expirations = try JSONDecoder().decode([String].self, from: data)
                print(expirations)
                print(type(of: expirations))
                //return expirations  <----- i stupidly thought this would work...            
              
            } catch let jsonError {
                print("Error serializing json data from get request!")
                //return []    <----- the catch should return an empty Array
            }
            
        }; request.resume()
    }
    
}