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For examples of extensions using this hook, see Category:FlowTermsOfUseMessages extensions . Category:Extension hooks#FlowTermsOfUseMessages Category:Undocumented extension hooks#FlowTermsOfUseMessages Category:Extension hooks provided by Structured Discussions Category:Extension hooks#FlowTermsOfUseMessages Category:Undocumented extension hooks#FlowTermsOfUseMessages Category:Extension hooks provided by Structured Discussions