Optional. 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 cu
{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "RollbackFhirResourceFilteringFields",
"properties": {
"metadataFilter": {
"description": "Optional. 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.",
"type": "string"
},
"operationIds": {
"description": "Optional. A list of operation IDs to roll back.",
"items": {
"format": "uint64",
"type": "string"
},
"type": "array"
}
},
"type": "object"
}