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-rw-r--r--railties/guides/source/active_support_overview.textile2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/guides/source/active_support_overview.textile b/railties/guides/source/active_support_overview.textile
index 64c66b4f46..7b3e03e09b 100644
--- a/railties/guides/source/active_support_overview.textile
+++ b/railties/guides/source/active_support_overview.textile
@@ -176,6 +176,8 @@ A.subclasses # => []
C # => NameError: uninitialized constant C
</ruby>
+See also +Object#remove_subclasses_of+ in "Extensions to All Objects FIX THIS LINK":FIXME.
+
h3. Extensions to +NilClass+
...