code: function(lender) {
                  console.log('borrowInterface.lender.update');
  
                  return this.request({
                      url: this._buildUri(this.uri, this.id),
                      method: corbel.request.method.PUT,
                      data: lender
                  });
              }
docs: Update a Lender.
  
  @method
  @memberOf corbel.Borrow.LenderBuilder
  
  @param {Object} lender   The lender data.
  
  @return {Promise} A promise resolves to undefined (void) or fails with a {@link corbelError}.