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diff --git a/web/modules/contrib/drupalmoduleupgrader/src/Routing/ParameterMap.php b/web/modules/contrib/drupalmoduleupgrader/src/Routing/ParameterMap.php
new file mode 100644
index 000000000..65eb3affb
--- /dev/null
+++ b/web/modules/contrib/drupalmoduleupgrader/src/Routing/ParameterMap.php
@@ -0,0 +1,156 @@
+<?php
+
+namespace Drupal\drupalmoduleupgrader\Routing;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Drupal\drupalmoduleupgrader\Utility\Path\Drupal7\PathComponent;
+use Drupal\drupalmoduleupgrader\Utility\Path\Drupal8\PathComponent as PathComponent8x;
+use Drupal\drupalmoduleupgrader\Utility\Path\PathUtilityInterface;
+use Symfony\Component\Routing\Route as Drupal8Route;
+
+/**
+ * Represents a set of parameter bindings for a particular path, callback,
+ * and set of arguments.
+ */
+class ParameterMap extends ArrayCollection {
+
+  /**
+   * @var \Drupal\drupalmoduleupgrader\Utility\Path\PathUtilityInterface
+   */
+  protected $path;
+
+  /**
+   * @var integer
+   */
+  protected $_length = 0;
+
+  protected $bindings = [];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(PathUtilityInterface $path, array $parameters, array $arguments = []) {
+    parent::__construct();
+    $this->path = $path;
+    $this->_length = sizeof($path);
+
+    while ($parameters) {
+      $argument = $arguments ? array_shift($arguments) : ParameterBinding::NO_ARGUMENT;
+      $this->addBinding(new ParameterBinding($path, array_shift($parameters), $argument));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function toArray() {
+    $output = [];
+
+    foreach ($this->bindings as $key => $bindings) {
+      if (is_integer($key)) {
+        /** @var ParameterBinding[] $bindings */
+        foreach ($bindings as $binding) {
+          $parameter = $binding->getParameter()->getName();
+          $function = $binding->getParameter()->getFunction()->getName()->getText();
+          $output[$function][$parameter]['name'] = $bindings[0]->getParameter()->getName();
+
+          $value = $bindings[0]->getValue();
+          if ($value instanceof PathComponent && $value->isWildcard()) {
+            $output[$function][$parameter]['type'] = ltrim($value, '%');
+          }
+        }
+      }
+    }
+
+    return $output;
+  }
+
+  /**
+   * Merge another parameter map into this one. Bindings from the incoming map
+   * should 'win', although the specifics are up to the implementing classes.
+   *
+   * @param ParameterMap $map
+   *  The parameter map to merge.
+   */
+  public function merge(ParameterMap $map) {
+    foreach ($map as $binding) {
+      $this->addBinding($binding);
+    }
+  }
+
+  /**
+   * Adds a binding to this map, overwriting the existing one if there is a
+   * conflict.
+   *
+   * @param ParameterBinding $binding
+   *  The binding to add.
+   */
+  public function addBinding(ParameterBinding $binding) {
+    $value = $binding->getValue();
+    // The binding will return a PathComponent if it expects to be physically
+    // represented in the path, whether or not it already is.
+    if ($value instanceof PathComponent) {
+      if ($binding->inPath()) {
+        $key = $binding->getArgument();
+      }
+      else {
+        $key = $this->path->indexOf($value);
+        if ($key === FALSE) {
+          $key = $this->_length++;
+        }
+      }
+    }
+    else {
+      $key = $binding->getParameter()->getName();
+    }
+
+    $this->set($key, $binding);
+
+    if (! isset($this->bindings[$key])) {
+      $this->bindings[$key] = [];
+    }
+    array_unshift($this->bindings[$key], $binding);
+  }
+
+  /**
+   * Applies the parameter map to a path, modifying it as needed.
+   *
+   * @param \Drupal\drupalmoduleupgrader\Utility\Path\PathUtilityInterface $path
+   *  The path to modify (in-place).
+   */
+  public function applyPath(PathUtilityInterface $path) {
+    foreach ($this as $key => $binding) {
+      if (is_integer($key)) {
+        $path[$key] = new PathComponent8x('{' . $binding->getParameter()->getName() . '}');
+      }
+    }
+  }
+
+  /**
+   * Apply the parameter map to a Drupal 8 route, modifying it as needed.
+   *
+   * @param \Symfony\Component\Routing\Route $route
+   *  The route to process.
+   */
+  public function applyRoute(Drupal8Route $route) {
+    $this->applyPath($this->path);
+
+    foreach ($this as $key => $binding) {
+      $parameter = $binding->getParameter();
+
+      /** @var ParameterBinding $binding */
+      if (is_integer($key)) {
+        if ($parameter->isOptional()) {
+          // @todo Don't use eval().
+          $value = eval('return ' . $parameter->getValue() . ';');
+          $route->setDefault($parameter->getName(), $value);
+        }
+      }
+      elseif ($binding->hasArgument()) {
+        $route->setDefault($parameter->getName(), $binding->getValue());
+      }
+    }
+    $route->setPath($this->path->__toString());
+  }
+
+}