1. boolgrowable =true,

Creates aList containing the elements of thisIterable.

The elements are in iteration order.The list is fixed-length ifgrowable is false.

Example:

final planets = <int, String>{1: 'Mercury', 2: 'Venus', 3: 'Mars'};final keysList = planets.keys.toList(growable: false); // [1, 2, 3]final valuesList =    planets.values.toList(growable: false); // [Mercury, Venus, Mars]

Implementation

List<E> toList({bool growable = true}) {  if (this.isEmpty) return List<E>.empty(growable: growable);  var first = this[0];  var result = List<E>.filled(this.length, first, growable: growable);  for (int i = 1; i < this.length; i++) {    result[i] = this[i];  }  return result;}