toList method Null safety Future<List<T>> toList() Collects all elements of this stream in a List . Creates a List<T> and adds all elements of this stream to the list in the order they arrive. When this stream ends, the returned future is completed with that list.
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Flutter – FutureBuilder Widget
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get() method returns a Future object : Calling a function that returns a Future, will not block your code, that’s why that function is called asynchronous. Instead, it will immediately return a Future object, which is at first uncompleted. Future<T> means that the result of the asynchronous operation will be of type T .
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