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Add type hints
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@@ -51,7 +51,7 @@ final class CollectionTest extends BaseTestCase
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{
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$collection = new Collection(['foo', 'bar', 'baz']);
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$this->assertEquals(3, $collection->count());
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$collection = $collection->filter(function ($text) {
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$collection = $collection->filter(function ($text): bool {
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return substr($text, 0, 1) == 'b';
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});
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$this->assertEquals(2, $collection->count());
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