Rename isNull to isNullOrEmpty #21
Description
Because it does not only check if str == null but also checks if str.length == 0
(you could also refactor and use a built-in str.isEmpty instead of direct length accessing)
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Because it does not only check if str == null but also checks if str.length == 0
(you could also refactor and use a built-in str.isEmpty instead of direct length accessing)