Add generics to the progress bar iteration methods

Author: jdreesen

Helper/ProgressBar.php

@@ -305,7 +305,13 @@ public function maxSecondsBetweenRedraws(float $seconds): void
     /**
      * Returns an iterator that will automatically update the progress bar when iterated.
      *
-     * @param int|null $max Number of steps to complete the bar (0 if indeterminate), if null it will be inferred from $iterable
+     * @template TKey
+     * @template TValue
+     *
+     * @param iterable<TKey, TValue> $iterable
+     * @param int|null               $max      Number of steps to complete the bar (0 if indeterminate), if null it will be inferred from $iterable
+     *
+     * @return iterable<TKey, TValue>
      */
     public function iterate(iterable $iterable, int $max = null): iterable
     {

Style/SymfonyStyle.php

@@ -327,6 +327,14 @@ public function createProgressBar(int $max = 0): ProgressBar
 
     /**
      * @see ProgressBar::iterate()
+     *
+     * @template TKey
+     * @template TValue
+     *
+     * @param iterable<TKey, TValue> $iterable
+     * @param int|null               $max      Number of steps to complete the bar (0 if indeterminate), if null it will be inferred from $iterable
+     *
+     * @return iterable<TKey, TValue>
      */
     public function progressIterate(iterable $iterable, int $max = null): iterable
     {