When you're updating resources, you must provide update masks for the fields being updated. If a field mask references a property of a nested object, the object must exist on the request but it can be empty.

For example, if an update mask contains the path details.first_name, first_name can be empty but the details object must not be empty.

When you're updating resources, you must provide update masks for the fields being updated. If a field mask references a property of a nested object, the object must exist on the request but it can be empty.

For example, if an update mask contains the path details.first_name, first_name can be empty but the details object must not be empty.