history property

Optional. The historical or future-looking state of the resource pattern.

Example:

// The InspectTemplate message originally only supported resource
// names with organization, and project was added later.
message InspectTemplate {
  option (google.api.resource) = {
    type: "dlp.googleapis.com/InspectTemplate"
    pattern:
    "organizations/{organization}/inspectTemplates/{inspect_template}"
    pattern: "projects/{project}/inspectTemplates/{inspect_template}"
    history: ORIGINALLY_SINGLE_PATTERN
  };
}