not_iterable_spread
Details about the 'not_iterable_spread' diagnostic produced by the Dart analyzer.
Spread elements in list or set literals must implement 'Iterable'.
Description
#
The analyzer produces this diagnostic when the static type of the
expression of a spread element that appears in either a list literal or a
set literal doesn't implement the type Iterable.
Example
#The following code produces this diagnostic:
dart
var m = <String, int>{'a': 0, 'b': 1};
var s = <String>{...m};
Common fixes
#The most common fix is to replace the expression with one that produces an iterable object:
dart
var m = <String, int>{'a': 0, 'b': 1};
var s = <String>{...m.keys};
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