fillRange abstract method Null safety
Overwrites a range of elements with fillValue.
Sets the positions greater than or equal to start and less than end,
to fillValue.
The provided range, given by start and end, must be valid.
A range from start to end is valid if 0 ≤ start ≤ end ≤ length.
An empty range (with end == start) is valid.
If the element type is not nullable, the fillValue must be provided and
must be non-null.
Example:
final words = List.filled(5, 'old');
print(words); // [old, old, old, old, old]
words.fillRange(1, 3, 'new');
print(words); // [old, new, new, old, old]
Implementation
void fillRange(int start, int end, [E? fillValue]);