'Access the document_permissions
:returns: twilio.rest.sync.v1.service.document.document_permission.DocumentPermissionList
:rtype: twilio.rest.sync.v1.service.document.document_permission.DocumentPermissionList'

@property
def document_permissions(self):

    if (self._document_permissions is None):
        self._document_permissions = DocumentPermissionList(self._version, service_sid=self._solution['service_sid'], document_sid=self._solution['sid'])
    return self._document_permissions
