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prefer-add-all

added in: 1.24.0
style
Pro+

Suggests using .addAll() instead of multiple .add() invocations.

Example​

❌ Bad:

void fn(List<String> values) {
  values.add('first');

  // LINT: Prefer 'addAll()' over multiple 'add()' invocations.
  values.add('second');
}

✅ Good:

void fn(List<String> values) {
  values.addAll(['first', 'second']);
}