List.filled(int length, E fill, {bool growable: false})

Creates a fixed-length list of the given length, and initializes the value at each position with fill:

new List<int>.filled(3, 0); // [0, 0, 0]

The length must be a non-negative integer.

If the list is growable, changing its length will not initialize new entries with fill. After being created and filled, the list is no different from any other growable or fixed-length list created using List.

Source

external factory List.filled(int length, E fill, {bool growable: false});