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diff --git a/vendor/doctrine/collections/lib/Doctrine/Common/Collections/Criteria.php b/vendor/doctrine/collections/lib/Doctrine/Common/Collections/Criteria.php
new file mode 100644
index 000000000..3f9d43a82
--- /dev/null
+++ b/vendor/doctrine/collections/lib/Doctrine/Common/Collections/Criteria.php
@@ -0,0 +1,259 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Collections;
+
+use Doctrine\Common\Collections\Expr\Expression;
+use Doctrine\Common\Collections\Expr\CompositeExpression;
+
+/**
+ * Criteria for filtering Selectable collections.
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @since 2.3
+ */
+class Criteria
+{
+    /**
+     * @var string
+     */
+    const ASC  = 'ASC';
+
+    /**
+     * @var string
+     */
+    const DESC = 'DESC';
+
+    /**
+     * @var \Doctrine\Common\Collections\ExpressionBuilder|null
+     */
+    private static $expressionBuilder;
+
+    /**
+     * @var \Doctrine\Common\Collections\Expr\Expression|null
+     */
+    private $expression;
+
+    /**
+     * @var string[]
+     */
+    private $orderings = array();
+
+    /**
+     * @var int|null
+     */
+    private $firstResult;
+
+    /**
+     * @var int|null
+     */
+    private $maxResults;
+
+    /**
+     * Creates an instance of the class.
+     *
+     * @return Criteria
+     */
+    public static function create()
+    {
+        return new static();
+    }
+
+    /**
+     * Returns the expression builder.
+     *
+     * @return \Doctrine\Common\Collections\ExpressionBuilder
+     */
+    public static function expr()
+    {
+        if (self::$expressionBuilder === null) {
+            self::$expressionBuilder = new ExpressionBuilder();
+        }
+
+        return self::$expressionBuilder;
+    }
+
+    /**
+     * Construct a new Criteria.
+     *
+     * @param Expression    $expression
+     * @param string[]|null $orderings
+     * @param int|null      $firstResult
+     * @param int|null      $maxResults
+     */
+    public function __construct(Expression $expression = null, array $orderings = null, $firstResult = null, $maxResults = null)
+    {
+        $this->expression = $expression;
+
+        $this->setFirstResult($firstResult);
+        $this->setMaxResults($maxResults);
+
+        if (null !== $orderings) {
+            $this->orderBy($orderings);
+        }
+    }
+
+    /**
+     * Sets the where expression to evaluate when this Criteria is searched for.
+     *
+     * @param Expression $expression
+     *
+     * @return Criteria
+     */
+    public function where(Expression $expression)
+    {
+        $this->expression = $expression;
+
+        return $this;
+    }
+
+    /**
+     * Appends the where expression to evaluate when this Criteria is searched for
+     * using an AND with previous expression.
+     *
+     * @param Expression $expression
+     *
+     * @return Criteria
+     */
+    public function andWhere(Expression $expression)
+    {
+        if ($this->expression === null) {
+            return $this->where($expression);
+        }
+
+        $this->expression = new CompositeExpression(CompositeExpression::TYPE_AND, array(
+            $this->expression, $expression
+        ));
+
+        return $this;
+    }
+
+    /**
+     * Appends the where expression to evaluate when this Criteria is searched for
+     * using an OR with previous expression.
+     *
+     * @param Expression $expression
+     *
+     * @return Criteria
+     */
+    public function orWhere(Expression $expression)
+    {
+        if ($this->expression === null) {
+            return $this->where($expression);
+        }
+
+        $this->expression = new CompositeExpression(CompositeExpression::TYPE_OR, array(
+            $this->expression, $expression
+        ));
+
+        return $this;
+    }
+
+    /**
+     * Gets the expression attached to this Criteria.
+     *
+     * @return Expression|null
+     */
+    public function getWhereExpression()
+    {
+        return $this->expression;
+    }
+
+    /**
+     * Gets the current orderings of this Criteria.
+     *
+     * @return string[]
+     */
+    public function getOrderings()
+    {
+        return $this->orderings;
+    }
+
+    /**
+     * Sets the ordering of the result of this Criteria.
+     *
+     * Keys are field and values are the order, being either ASC or DESC.
+     *
+     * @see Criteria::ASC
+     * @see Criteria::DESC
+     *
+     * @param string[] $orderings
+     *
+     * @return Criteria
+     */
+    public function orderBy(array $orderings)
+    {
+        $this->orderings = array_map(
+            function ($ordering) {
+                return strtoupper($ordering) === Criteria::ASC ? Criteria::ASC : Criteria::DESC;
+            },
+            $orderings
+        );
+
+        return $this;
+    }
+
+    /**
+     * Gets the current first result option of this Criteria.
+     *
+     * @return int|null
+     */
+    public function getFirstResult()
+    {
+        return $this->firstResult;
+    }
+
+    /**
+     * Set the number of first result that this Criteria should return.
+     *
+     * @param int|null $firstResult The value to set.
+     *
+     * @return Criteria
+     */
+    public function setFirstResult($firstResult)
+    {
+        $this->firstResult = null === $firstResult ? null : (int) $firstResult;
+
+        return $this;
+    }
+
+    /**
+     * Gets maxResults.
+     *
+     * @return int|null
+     */
+    public function getMaxResults()
+    {
+        return $this->maxResults;
+    }
+
+    /**
+     * Sets maxResults.
+     *
+     * @param int|null $maxResults The value to set.
+     *
+     * @return Criteria
+     */
+    public function setMaxResults($maxResults)
+    {
+        $this->maxResults = null === $maxResults ? null : (int) $maxResults;
+
+        return $this;
+    }
+}