From 769b04add4f5c9340a5216c428543768806a608e Mon Sep 17 00:00:00 2001
From: Fritz Obermeyer <fritzo@uber.com>
Date: Sun, 16 Aug 2020 13:21:57 -0700
Subject: [PATCH] Fix sphinx warning about lazy_property (#353)

---
 funsor/util.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/funsor/util.py b/funsor/util.py
index 3b45b00ab..7bfdcc803 100644
--- a/funsor/util.py
+++ b/funsor/util.py
@@ -24,6 +24,10 @@ def __get__(self, obj, objtype=None):
         setattr(obj, self.fn.__name__, value)
         return value
 
+    # This is needed to pacify sphinx.
+    def __call__(self):
+        raise ValueError
+
 
 def getargspec(fn):
     """