length property Null safety
inherited
Returns the number of elements in this.
Counting all elements may involve iterating through all elements and can therefore be slow. Some iterables have a more efficient way to find the number of elements.
Implementation
@override
int get length => _base.length;inherited
Throws an UnsupportedError; operations that change the length of the list are disallowed.
Implementation
@override
set length(int newLength) => _throw();