Add dummy dynamic segments filters

[MAILPOET-3077]

lib/Segments/DynamicSegments/Exceptions/InvalidFilterException.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace MailPoet\Segments\DynamicSegments\Exceptions;
+
+use MailPoet\InvalidStateException;
+
+class InvalidFilterException extends InvalidStateException {
+
+  const MISSING_TYPE = 1;
+  const INVALID_TYPE = 2;
+  const MISSING_ROLE = 3;
+  const MISSING_ACTION = 4;
+  const MISSING_NEWSLETTER_ID = 5;
+  const MISSING_CATEGORY_ID = 6;
+  const MISSING_PRODUCT_ID = 7;
+
+};