docs: function RestifyClient(options) {
      assert.object(options, 'options');
      assert.string(options.url, 'options.url');
      assert.optionalObject(options.contentMd5, 'options.contentMd5');
  
      if (!options.contentMd5) {
          options.contentMd5 = {
              encodings: ['utf8', 'binary']
          };
      }
  
      this.client = restifyClients.createJsonClient(options);
  
      if (options.username && options.password)
          this.client.basicAuth(options.username, options.password);
  }