Update pools

Author: abnegate

composer.lock

@@ -10,10 +10,13 @@
 
 class Pool extends Adapter
 {
+    /**
+     * @var UtopiaPool<covariant Adapter>
+     */
     protected UtopiaPool $pool;
 
     /**
-     * @param UtopiaPool $pool The pool to use for connections. Must contain instances of Adapter.
+     * @param UtopiaPool<covariant Adapter> $pool The pool to use for connections. Must contain instances of Adapter.
      * @throws DatabaseException
      */
     public function __construct(UtopiaPool $pool)

src/Database/Adapter/Pool.php

@@ -19,7 +19,11 @@
 class PoolTest extends Base
 {
     public static ?Database $database = null;
-    protected static ?UtopiaPool $pool = null;
+
+    /**
+     * @var UtopiaPool<MySQL>
+     */
+    protected static UtopiaPool $pool;
     protected static string $namespace;
 
     /**
@@ -76,7 +80,7 @@ protected static function deleteColumn(string $collection, string $column): bool
         $sql = "ALTER TABLE {$sqlTable} DROP COLUMN `{$column}`";
 
         self::$pool->use(function (Adapter $adapter) use ($sql) {
-            // Hack to get adapter PDO
+            // Hack to get adapter PDO reference
             $class = new ReflectionClass($adapter);
             $property = $class->getProperty('pdo');
             $property->setAccessible(true);
@@ -93,7 +97,7 @@ protected static function deleteIndex(string $collection, string $index): bool
         $sql = "DROP INDEX `{$index}` ON {$sqlTable}";
 
         self::$pool->use(function (Adapter $adapter) use ($sql) {
-            // Hack to get adapter PDO
+            // Hack to get adapter PDO reference
             $class = new ReflectionClass($adapter);
             $property = $class->getProperty('pdo');
             $property->setAccessible(true);