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diff --git a/web/modules/contrib/drupalmoduleupgrader/src/Utility/Path/PathUtilityBase.php b/web/modules/contrib/drupalmoduleupgrader/src/Utility/Path/PathUtilityBase.php
new file mode 100644
index 000000000..b2ca3a8a0
--- /dev/null
+++ b/web/modules/contrib/drupalmoduleupgrader/src/Utility/Path/PathUtilityBase.php
@@ -0,0 +1,140 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\drupalmoduleupgrader\Utility\Path\PathUtilityBase.
+ */
+
+namespace Drupal\drupalmoduleupgrader\Utility\Path;
+
+use Doctrine\Common\Collections\ArrayCollection;
+
+/**
+ * Base class for PathUtilityInterface implementations.
+ */
+abstract class PathUtilityBase extends ArrayCollection implements PathUtilityInterface {
+
+  /**
+   * The next index for getNextWildcard() to slice on.
+   *
+   * @var integer
+   */
+  protected $_wildcard = 0;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct($path) {
+    if (is_array($path)) {
+      foreach ($path as $component) {
+        $this->add($component);
+      }
+    }
+    elseif (is_string($path)) {
+      $this->__construct(explode('/', $path));
+    }
+    else {
+      throw new \InvalidArgumentException();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function add($value) {
+    if ($value instanceof PathComponentInterface) {
+      parent::add($value);
+    }
+    elseif (is_scalar($value)) {
+      $this->add(static::getComponent($value));
+    }
+    else {
+      throw new \InvalidArgumentException();
+    }
+  }
+
+  /**
+   * Filters the path by a string. The filtered path will only contain
+   * components whose string representation is identical to $element.
+   *
+   * @param string $element
+   *  The string to search for.
+   *
+   * @return static
+   */
+  public function find($element) {
+    return $this
+      ->filter(function(PathComponentInterface $component) use ($element) {
+        return ($element === $component->__toString());
+      });
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function contains($element) {
+    return (boolean) $this->find($element)->count();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function hasWildcards() {
+    return ($this->getWildcards()->count() > 0);
+  }
+
+  /**
+   * Returns every {wildcard} in the path, keyed by position.
+   *
+   * @return static
+   */
+  public function getWildcards() {
+    return $this->filter(function(PathComponentInterface $component) {
+      return $component->isWildcard();
+    });
+  }
+
+  /**
+   * Returns the next wildcard, if any.
+   *
+   * @return \Drupal\drupalmoduleupgrader\Utility\Path\PathComponentInterface|NULL
+   */
+  public function getNextWildcard() {
+    $wildcards = $this->getWildcards()->slice($this->_wildcard, 1);
+
+    if (isset($wildcards[$this->_wildcard])) {
+      return $wildcards[$this->_wildcard++];
+    }
+  }
+
+  /**
+   * Returns a copy of the collection with wildcards removed.
+   *
+   * @return static
+   */
+  public function deleteWildcards() {
+    return $this->filter(function(PathComponentInterface $component) {
+      return (! $component->isWildcard());
+    });
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParent() {
+    if ($this->count() > 1) {
+      return new static($this->slice(0, -1));
+    }
+    else {
+      throw new \LengthException('Cannot get parent a path with one component.');
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __toString() {
+    return implode('/', $this->toArray());
+  }
+
+}