Generic methods in Dart

import 'dart:convert';
//This generic function prints and returns the item at the first index (0) of a list
T printFirst<T>(List<T> lst) {  //List of generic type taken as function argument
  T first = lst[0]; //Generic type as local variable
  print(first);
  return first; //Generic type as return value
}
void main() {
    //Lists of three different data types declared
    List<int> intList = [2, 4, 9, 10];
    List<double> doubleList = [5.2, 9.1, 1.2, 3.5]; 
    List<String> stringList = ["cat", "giraffe", "panther", "scorpion"];
    
    //Generic function printFirst called on Lists if different times
    printFirst(intList);
    printFirst(doubleList);
    printFirst(stringList);
}