function MyPowershellFunction {
    param($param1)
    # ...
    # lot of code here
    # ...

    # access variable x on private scope explicitly
    if ($private:x) {
         # do something
    }
}

function MyPowershellFunction {
    param($param1)

    # access variable x on private scope explicitly
    if ($local:x) {
         # do something
    }
}