Accessing SearchAttributes from the client (think test)

I’m writing a test which checks that a search attribute is being set (Kotlin/Java SDK).

This is a helper I came up with:

    private fun findSearchAttributeBooleanValue(
        workflowId: String,
        fieldName: String,
    ): Boolean {
        val workflowExecution =
            WorkflowExecution
                .newBuilder()
                .setWorkflowId(workflowId)
                .build()

        val request =
            DescribeWorkflowExecutionRequest
                .newBuilder()
                .setNamespace(client.options.namespace)
                .setExecution(workflowExecution)
                .build()

        val response = testEnv.workflowServiceStubs.blockingStub().describeWorkflowExecution(request)

        val rawValue =
            response.workflowExecutionInfo.searchAttributes.indexedFieldsMap[fieldName]

        return (rawValue as Payload).data.toString(Charsets.UTF_8).toBoolean()
    }

Is there a more reasonable way to access a workflow’s search attributes from the client?