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diff --git a/vendor/behat/behat/src/Behat/Behat/Transformation/Transformation/ReturnTypeTransformation.php b/vendor/behat/behat/src/Behat/Behat/Transformation/Transformation/ReturnTypeTransformation.php
new file mode 100644
index 000000000..ecdc613a1
--- /dev/null
+++ b/vendor/behat/behat/src/Behat/Behat/Transformation/Transformation/ReturnTypeTransformation.php
@@ -0,0 +1,218 @@
+<?php
+
+/*
+ * This file is part of the Behat.
+ * (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\Behat\Transformation\Transformation;
+
+use Behat\Behat\Definition\Call\DefinitionCall;
+use Behat\Behat\Transformation\Call\TransformationCall;
+use Behat\Behat\Transformation\SimpleArgumentTransformation;
+use Behat\Testwork\Call\CallCenter;
+use Behat\Testwork\Call\RuntimeCallee;
+use Closure;
+use ReflectionFunctionAbstract;
+use ReflectionMethod;
+use ReflectionParameter;
+
+/**
+ * By-type object transformation.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+final class ReturnTypeTransformation extends RuntimeCallee implements SimpleArgumentTransformation
+{
+
+    /**
+     * {@inheritdoc}
+     */
+    static public function supportsPatternAndMethod($pattern, ReflectionMethod $method)
+    {
+        $returnClass = self::getReturnClass($method);
+
+        if (null === $returnClass) {
+            return false;
+        }
+
+        return '' === $pattern;
+    }
+
+    /**
+     * Initializes transformation.
+     *
+     * @param string      $pattern
+     * @param callable    $callable
+     * @param null|string $description
+     */
+    public function __construct($pattern, $callable, $description = null)
+    {
+        parent::__construct($callable, $description);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supportsDefinitionAndArgument(DefinitionCall $definitionCall, $argumentIndex, $argumentValue)
+    {
+        $returnClass = self::getReturnClass($this->getReflection());
+
+        if (null === $returnClass) {
+            return false;
+        }
+
+        $parameterClass = $this->getParameterClassNameByIndex($definitionCall, $argumentIndex);
+
+        return $parameterClass === $returnClass;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function transformArgument(CallCenter $callCenter, DefinitionCall $definitionCall, $argumentIndex, $argumentValue)
+    {
+        $call = new TransformationCall(
+            $definitionCall->getEnvironment(),
+            $definitionCall->getCallee(),
+            $this,
+            array($argumentValue)
+        );
+
+        $result = $callCenter->makeCall($call);
+
+        if ($result->hasException()) {
+            throw $result->getException();
+        }
+
+        return $result->getReturn();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 80;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPattern()
+    {
+        return null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        return 'ReturnTypeTransform';
+    }
+
+    /**
+     * Extracts parameters from provided definition call.
+     *
+     * @param ReflectionFunctionAbstract $reflection
+     *
+     * @return null|string
+     */
+    static private function getReturnClass(ReflectionFunctionAbstract $reflection)
+    {
+        $type = $reflection->getReturnType();
+
+        if (null === $type || $type->isBuiltin()) {
+            return null;
+        }
+
+        return (string) $type;
+    }
+
+    /**
+     * Attempts to get definition parameter using its index (parameter position or name).
+     *
+     * @param DefinitionCall $definitionCall
+     * @param string|integer $argumentIndex
+     *
+     * @return null|string
+     */
+    private function getParameterClassNameByIndex(DefinitionCall $definitionCall, $argumentIndex)
+    {
+        $parameters = array_filter(
+            array_filter($this->getCallParameters($definitionCall),
+                $this->hasIndex($argumentIndex)
+            ),
+            $this->isClass()
+        );
+        return count($parameters) ? current($parameters)->getClass()->getName() : null;
+    }
+
+    /**
+     * Extracts parameters from provided definition call.
+     *
+     * @param DefinitionCall $definitionCall
+     *
+     * @return ReflectionParameter[]
+     */
+    private function getCallParameters(DefinitionCall $definitionCall)
+    {
+        return $definitionCall->getCallee()->getReflection()->getParameters();
+    }
+
+    /**
+     * Returns appropriate closure for filtering parameter by index.
+     *
+     * @param string|integer $index
+     *
+     * @return Closure
+     */
+    private function hasIndex($index)
+    {
+        return is_string($index) ? $this->hasName($index) : $this->hasPosition($index);
+    }
+
+    /**
+     * Returns closure to filter parameter by name.
+     *
+     * @param string $index
+     *
+     * @return Closure
+     */
+    private function hasName($index)
+    {
+        return function (ReflectionParameter $parameter) use ($index) {
+            return $index === $parameter->getName();
+        };
+    }
+
+    /**
+     * Returns closure to filter parameter by position.
+     *
+     * @param integer $index
+     *
+     * @return Closure
+     */
+    private function hasPosition($index)
+    {
+        return function (ReflectionParameter $parameter) use ($index) {
+            return $index === $parameter->getPosition();
+        };
+    }
+
+    /**
+     * Returns closure to filter parameter by typehinted class.
+     *
+     * @return Closure
+     */
+    private function isClass()
+    {
+        return function (ReflectionParameter $parameter) {
+            return $parameter->getClass();
+        };
+    }
+}