'Safe defaults for model-global names in case module is disabled'

@staticmethod
def defaults():

    dummy = S3ReusableField('dummy_id', 'integer', readable=False, writable=False)
    return dict(hrm_department_id=(lambda **attr: dummy('department_id')), hrm_job_title_id=(lambda **attr: dummy('job_title_id')), hrm_human_resource_id=(lambda **attr: dummy('human_resource_id')))
