def _(name = nil)
      url_path = name ? @url_path + [name] : @url_path
      Client.new(host: @host, request_headers: @request_headers,
                 version: @version, url_path: url_path,
                 http_options: @http_options)
    end
def _(name = nil)
      url_path = name ? @url_path + [name] : @url_path
      Client.new(host: @host, request_headers: @request_headers,
                 version: @version, url_path: url_path,
                 http_options: @http_options)
    end
Add variable values to the url.
 (e.g. /your/api/{variable_value}/call)
 Another example: if you have a ruby reserved word, such as true,
 in your url, you must use this method.

 * *Args*    :
   - +name+ -> Name of the url segment
 * *Returns* :
   - Client object