metadataFilter property
A filter expression that matches data in the Resource.meta element.
Supports all filters in [AIP-160](https://google.aip.dev/160) except the
"has" (:) operator. Supports the following custom functions: * tag("") = "" for tag filtering. * extension_value_ts("") = for filtering
extensions with a timestamp, where `` is a Unix timestamp. Supports the
>, <, <=, >=, and != comparison operators.
Optional.
Implementation
core.String? metadataFilter;