code: func (r Account_Agreement) GetAttachedBillingAgreementFiles() (resp []datatypes.Account_MasterServiceAgreement, err error) {
  	err = r.Session.DoRequest("SoftLayer_Account_Agreement", "getAttachedBillingAgreementFiles", nil, &r.Options, &resp)
  	return
  }
docs: // Retrieve The files attached to an agreement.