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diff --git a/vendor/behat/behat/src/Behat/Testwork/Specification/GroupedSpecificationIterator.php b/vendor/behat/behat/src/Behat/Testwork/Specification/GroupedSpecificationIterator.php
new file mode 100644
index 000000000..bac556d05
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+++ b/vendor/behat/behat/src/Behat/Testwork/Specification/GroupedSpecificationIterator.php
@@ -0,0 +1,137 @@
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\Specification;
+
+use Behat\Testwork\Suite\Suite;
+
+/**
+ * Iterates over specification iterators grouped by their suite.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+final class GroupedSpecificationIterator implements SpecificationIterator
+{
+    /**
+     * @var Suite
+     */
+    private $suite;
+    /**
+     * @var SpecificationIterator[]
+     */
+    private $iterators;
+    /**
+     * @var integer
+     */
+    private $position = 0;
+
+    /**
+     * Initializes iterator.
+     *
+     * @param Suite                   $suite
+     * @param SpecificationIterator[] $specificationIterators
+     */
+    public function __construct(Suite $suite, array $specificationIterators)
+    {
+        $this->suite = $suite;
+        $this->iterators = $specificationIterators;
+    }
+
+    /**
+     * Groups specifications by their suite.
+     *
+     * @param SpecificationIterator[] $specificationIterators
+     *
+     * @return GroupedSpecificationIterator[]
+     */
+    public static function group(array $specificationIterators)
+    {
+        $groupedSpecifications = array();
+        foreach ($specificationIterators as $specificationIterator) {
+            $groupedSpecifications[$specificationIterator->getSuite()->getName()][] = $specificationIterator;
+        }
+
+        return array_map(
+            function ($iterator) {
+                return new GroupedSpecificationIterator($iterator[0]->getSuite(), $iterator);
+            },
+            $groupedSpecifications
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSuite()
+    {
+        return $this->suite;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rewind()
+    {
+        $this->position = 0;
+        while (isset($this->iterators[$this->position])) {
+            $this->iterators[$this->position]->rewind();
+
+            if ($this->iterators[$this->position]->valid()) {
+                break;
+            }
+            $this->position++;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function next()
+    {
+        if (!isset($this->iterators[$this->position])) {
+            return;
+        }
+
+        $this->iterators[$this->position]->next();
+        while (!$this->iterators[$this->position]->valid()) {
+            $this->position++;
+
+            if (!isset($this->iterators[$this->position])) {
+                break;
+            }
+
+            $this->iterators[$this->position]->rewind();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function valid()
+    {
+        return isset($this->iterators[$this->position]) && $this->iterators[$this->position]->valid();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function current()
+    {
+        return $this->iterators[$this->position]->current();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function key()
+    {
+        return $this->position + $this->iterators[$this->position]->key();
+    }
+}