+<?php
+
+namespace Wikimedia\Assert;
+
+use RuntimeException;
+
+/**
+ * Exception indicating that an precondition assertion failed.
+ * This generally means a disagreement between the caller and the implementation of a function.
+ *
+ * @license MIT
+ * @author Daniel Kinzler
+ * @copyright Wikimedia Deutschland e.V.
+ */
+class PreconditionException extends RuntimeException implements AssertionException {
+
+}