Is it Possible to Parameterize Server Type - Switch From MySQL to SQL Server?

I ended up doing it by making Source conditional, based off value of parameter, within the Power Query advanced editor.  

I'm using the approach below.

let
    Source =if server= "xerxes" 
    then MySQL.Database("xerxes.corp.brillo.com", "brilloweb_api", [Query="select *#(lf)from products;", ReturnSingleDatabase=true])
    else if 
    server = "alexander"
    then Sql.Database("alexander.corp.brillo.com", "brilloweb_api", [Query="SELECT * FROM products p;"])
    else MySQL.Database("xerxes.corp.brillo.com", "brilloweb_api", [Query="select *#(lf)from products;", ReturnSingleDatabase=true])  
in
    Source