description

# fillRange method Null safety

void fillRange (

1. int start,
2. int end,
3. [E? fillValue]

)
override

Sets the objects in the range `start` inclusive to `end` exclusive to the given `fillValue`.

The provided range, given by `start` and `end`, must be valid. A range from `start` to `end` is valid if `0 <= start <= end <= len`, where `len` is this list's `length`. The range starts at `start` and has length `end - start`. An empty range (with `end == start`) is valid.

Example:

     List<int> list = new List(3);
        list.fillRange(0, 2, 1);
        print(list); //  [1, 1, null]

If the element type is not nullable, omitting `fillValue` or passing `null` as `fillValue` will make the `fillRange` fail.

## Implementation

    void fillRange(int start, int end, [E? fillValue]) {
      throw new UnsupportedError("Cannot modify an immutable List.");
    }