skipInstancesOnValidationError property Null safety
Specifies whether the request should proceed despite the inclusion of instances that are not members of the group or that are already in the process of being deleted or abandoned.
If this field is set to
false and such an instance is specified in the
request, the operation fails. The operation always fails if the request
contains a malformed instance URL or a reference to an instance that
exists in a zone or region other than the group's zone or region.