code: function Signer(options) {
          options = options || {};
          this.options = options;
          this.service = options.service;
          this.bindServiceObject(options);
          this._operations = {};
      }
docs: Creates a presigner object with a set of configuration options.
  
  @option options params [map] An optional map of parameters to bind to every
  request sent by this service object.
  @option options service [AWS.Polly] An optional pre-configured instance
  of the AWS.Polly service object to use for requests. The object may
  bound parameters used by the presigner.
  @see AWS.Polly.constructor