var cloud.google.com/go/compute/metadata.instID

2 uses

	cloud.google.com/go/compute/metadata (current package)
		metadata.go#L61: 	instID  = &cachedValue{k: "instance/id", trim: true}
		metadata.go#L363: func (c *Client) InstanceID() (string, error) { return instID.get(c) }