Version AsOf in semantic model.

I could not get it to run live, but compromised with allowing users to pass parameters as a batchID and then refresh a model.  Took time bit worked.  Based on the function I used to decide if the parameter for the batch was passed or not would be how the data was queried.  For those that may find this useful the function was : 

// Query: GetDeltaLakeTable
(tableName as text) as table =>
let
    // Build base connection string
    conn = "https://onelake.dfs.fabric.microsoft.com/" 
           & pWorkspaceName & "/" 
           & pLakeName & ".Lakehouse/Tables/" 
           & pSchema & "/",

    // Load the target table
    Source = AzureStorage.DataLake(conn & tableName, [HierarchicalNavigation=true]),
    ToDelta = DeltaLake.Table(Source),

    // Decide whether to time travel
    timeTravel = Text.Upper(pBatchID) <> "BLANK",

    // Branch logic
    returnVal =
        if timeTravel then
            let
                // Load CDC batch log table
                batchtbl = AzureStorage.DataLake(conn & "_cdc_batch_log", [HierarchicalNavigation=true]),
                logTable = DeltaLake.Table(batchtbl),

                // Lookup version for this batch + table
                Version = GetTableVersion(tableName),

                // Get snapshot at that version
                GetVersions = Value.Versions(ToDelta),
                Result = if Version <> null then GetVersions{Version}[Data] else ToDelta
            in
                Result
        else
            ToDelta
in
    returnVal