# File lib/faraday/connection.rb, line 254
    def build_url(url, extra_params = nil)
      uri = build_exclusive_url(url)

      query_values = self.params.dup.merge_query(uri.query)
      query_values.update extra_params if extra_params
      uri.query = query_values.empty? ? nil : query_values.to_query

      uri
    end