A filter expression that filters backups listed in the response. The expression must specify the field name, a comparison operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The comparison operator must be <, >, <=, >=, !=, =, or :. Colon ‘:’ represents a HAS operator which is roughly synonymous with equality. Filter rules are case insensitive.
An expression for specifying the sort order of the results of the request. The string value should specify one or more fields in . The full syntax is described at https://aip.dev/132#ordering.