From b3e1e2d0073abfcd842a936ea4e3019998fb56f4 Mon Sep 17 00:00:00 2001
From: Juan Leyva <juanleyvadelgado@gmail.com>
Date: Tue, 19 May 2015 13:18:30 +0200
Subject: [PATCH] MDL-50271 webservices: Allow to load multiple themes in
 WS_SERVER mode

---
 lib/pagelib.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/pagelib.php b/lib/pagelib.php
index 0c0e99b2944..d1a5d780601 100644
--- a/lib/pagelib.php
+++ b/lib/pagelib.php
@@ -1828,6 +1828,11 @@ class moodle_page {
      * @throws coding_exception
      */
     protected function ensure_theme_not_set() {
+        // This is explicitly allowed for webservices though which may process many course contexts in a single request.
+        if (WS_SERVER) {
+            return;
+        }
+
         if (!is_null($this->_theme)) {
             throw new coding_exception('The theme has already been set up for this page ready for output. ' .
                     'Therefore, you can no longer change the theme, or anything that might affect what ' .