A DeviceReference is an API abstraction that lets you supply a device argument to a method using one of the following identifier types:
A numeric API resource ID.
Real-world hardware IDs, such as IMEI number, belonging to the manufactured device.
Methods that operate on devices take a DeviceReference as a parameter type because it's more flexible for the caller. To learn more about device identifiers, read Identifiers.
JSON representation
{// Union field device can be only one of the following:"deviceId": string,"deviceIdentifier": {object (DeviceIdentifier)}// End of list of possible types for union field device.}
Fields
Union field device. Required. The unique identifier for the device. device can be only one of the following: