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-rw-r--r--lib/gitlab/markdown/reference_filter.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/gitlab/markdown/reference_filter.rb b/lib/gitlab/markdown/reference_filter.rb
index d334a891509..c7d4b15d458 100644
--- a/lib/gitlab/markdown/reference_filter.rb
+++ b/lib/gitlab/markdown/reference_filter.rb
@@ -25,7 +25,7 @@ module Gitlab
end
def self.referenced_by(node)
- nil
+ raise NotImplementedError, "#{self} does not implement #{__method__}"
end
# Returns a data attribute String to attach to a reference link