Function cosmos_utils::modify

pub async fn modify<D: Serialize + DeserializeOwned + Debug, P: Into<PartitionKeys>, F: Fn(D) -> Result<D, Rejection>, C: ToString, S: ToString>(
    collection_name: C, 
    pk: P, 
    document_id: S, 
    transform: F
) -> Result<D, CosmosErrorStruct>

Modifies a document in cosmos by applying transform closure on the existing document and then inserting the returned document and returning the transformed document if successful If the transform closure fails then no insertion is performed and the error it fails with is returned