isNotEmpty property
bool isNotEmptyReturns true if there is at least one element in this collection.
May be computed by checking if iterator.moveNext() returns true.
Source
bool get isNotEmpty => readClasses().isNotEmpty;
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-svg/AttributeClassSet/isNotEmpty.html