# File lib/hashie/extensions/symbolize_keys.rb, line 45
        def symbolize_keys!(hash)
          hash.extend(Hashie::Extensions::SymbolizeKeys) unless hash.respond_to?(:symbolize_keys!)
          hash.keys.each do |k| # rubocop:disable Performance/HashEachMethods
            symbolize_keys_recursively!(hash[k])
            hash[k.to_sym] = hash.delete(k)
          end
          hash
        end