requirements property
Requirements that must be satisfied before a consumer project can use the service. Each requirement is of the form <service.name>/
For Google APIs, a Terms of Service requirement must be included here. Google Cloud APIs must include "serviceusage.googleapis.com/tos/cloud". Other Google APIs should include "serviceusage.googleapis.com/tos/universal". Additional ToS can be included based on the business needs.
Implementation
@$pb.TagNumber(1)
$pb.PbList<$core.String> get requirements => $_getList(0);