# File lib/new_relic/agent/http_clients/excon_wrappers.rb, line 9
        def initialize(response)
          @response = response
          # Since HTTP headers are case-insensitive, we normalize all of them to
          # upper case here, and then also in our [](key) implementation.
          @normalized_headers = {}
          headers = response.respond_to?(:headers) ? response.headers : response[:headers]
          (headers || {}).each do |key, val|
            @normalized_headers[key.upcase] = val
          end
        end