unused_shown_name

The name {0} is shown, but isn't used.

The analyzer produces this diagnostic when a show combinator includes a name that isn't used within the library. Because it isn't referenced, the name can be removed.

The following code produces this diagnostic because the function max isn't used:

import 'dart:math' show min, max;
​
var x = min(0, 1);

Either use the name or remove it:

import 'dart:math' show min;
​
var x = min(0, 1);