ResourceReference

Defines a proto annotation that describes a string field that refers to an API resource.

JSON representation 
{ "type": string, "childType": string }
Fields
type

string

The resource type that the annotated field references.

Example:

message Subscription { string topic = 2 [(google.api.resource_reference) = { type: "pubsub.googleapis.com/Topic" }]; }

Occasionally, a field may reference an arbitrary resource. In this case, APIs use the special value * in their resource reference.

Example:

message GetIamPolicyRequest { string resource = 2 [(google.api.resource_reference) = { type: "*" }]; }
childType

string

The resource type of a child collection that the annotated field references. This is useful for annotating the parent field that doesn't have a fixed resource type.

Example:

message ListLogEntriesRequest { string parent = 1 [(google.api.resource_reference) = { childType: "logging.googleapis.com/LogEntry" }; }