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expand_cache_key(key, namespace = nil) public

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# File activesupport/lib/active_support/cache.rb, line 46
    def self.expand_cache_key(key, namespace = nil)
      expanded_cache_key = namespace ? "#{namespace}/" : ""

      if ENV["RAILS_CACHE_ID"] || ENV["RAILS_APP_VERSION"]
        expanded_cache_key << "#{ENV["RAILS_CACHE_ID"] || ENV["RAILS_APP_VERSION"]}/"
      end

      expanded_cache_key << case
        when key.respond_to?(:cache_key)
          key.cache_key
        when key.is_a?(Array)
          key.collect { |element| expand_cache_key(element) }.to_param
        when key
          key.to_param
        end.to_s

      expanded_cache_key
    end
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