cleanup(options = nil) public

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# File activesupport/lib/active_support/cache/file_store.rb, line 30
      def cleanup(options = nil)
        options = merged_options(options)
        each_key(options) do |key|
          entry = read_entry(key, options)
          delete_entry(key, options) if entry && entry.expired?
        end
      end
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