[Form] add type hint in ChoiceList
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@ -256,7 +256,7 @@ class ChoiceList implements ChoiceListInterface
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*
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* @throws InvalidConfigurationException If no valid value or index could be created for a choice.
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*/
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protected function addChoices(&$bucketForPreferred, &$bucketForRemaining, $choices, array $labels, array $preferredChoices)
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protected function addChoices(array &$bucketForPreferred, array &$bucketForRemaining, $choices, array $labels, array $preferredChoices)
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{
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// Add choices to the nested buckets
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foreach ($choices as $group => $choice) {
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@ -298,7 +298,7 @@ class ChoiceList implements ChoiceListInterface
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*
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* @throws InvalidConfigurationException If no valid value or index could be created for a choice.
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*/
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protected function addChoiceGroup($group, &$bucketForPreferred, &$bucketForRemaining, array $choices, array $labels, array $preferredChoices)
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protected function addChoiceGroup($group, array &$bucketForPreferred, array &$bucketForRemaining, array $choices, array $labels, array $preferredChoices)
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{
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// If this is a choice group, create a new level in the choice
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// key hierarchy
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@ -335,7 +335,7 @@ class ChoiceList implements ChoiceListInterface
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*
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* @throws InvalidConfigurationException If no valid value or index could be created.
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*/
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protected function addChoice(&$bucketForPreferred, &$bucketForRemaining, $choice, $label, array $preferredChoices)
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protected function addChoice(array &$bucketForPreferred, array &$bucketForRemaining, $choice, $label, array $preferredChoices)
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{
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$index = $this->createIndex($choice);
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@ -86,7 +86,7 @@ class SimpleChoiceList extends ChoiceList
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* @param array $labels Ignored.
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* @param array $preferredChoices The preferred choices.
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*/
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protected function addChoices(&$bucketForPreferred, &$bucketForRemaining, $choices, array $labels, array $preferredChoices)
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protected function addChoices(array &$bucketForPreferred, array &$bucketForRemaining, $choices, array $labels, array $preferredChoices)
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{
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// Add choices to the nested buckets
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foreach ($choices as $choice => $label) {
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