gistfile1.txt

impl ImportOp {
    pub async fn fetch_kv(path: &Path, key: &str) -> Result<Vec<u8>> {
        // like fetch_import_artifacts, except it fetches arbitrary key-value data
    }

    /// Store data with a named key
    pub async fn store_kv(key: &str, data: Vec<u8>) {}

    pub async fn fetch_import_artifact(
        path: &IndirectIdentifer,
    ) -> Result<(ArtifactMetadata, Vec<u8>)> {
        // IF this ImportOp is from a batch which contains the requested path,
        // then block until the import processing loop has processed the target path,
        // and use the metadata+artifact from the `metadata_changes` HashMap
        // Otherwise, fetch metadata+artifact from database/regenerate it, similar to AssetHubService::get_import_artifacts.

        // Record the path in the path_refs reverse index.
        // Remove path refs that have been registered in a previous run, but are no longer being fetched.

        // Detect cyclic dependencies?
    }
}