Run things in parallel in PowerShell 7

Test-Parallel.ps1

Function Foo {
    @(1..2) | ForEach-Object -Parallel {
        switch ($_) {
            1 {
                Return 1
            }
            2 {
                # This could be something that takes a while
                # like a network call, etc
                Start-Sleep 3
                Write-Warning 'Finished Foo'
            }
        }
    }
}
Function Bar {
    Foo | ForEach-Object {
        $a = $_
        @(1..2) | ForEach-Object -Parallel {
            switch ($_) {
                1 {
                    $r = "$($_), 2"
                    Return $r
                }
                2 {
                    Start-Sleep 3
                    Write-Warning 'Finished Bar'
                }
            }
        }
    }
}

Bar | ForEach-Object {
    # This way we get to use the value
    # asap while all the defered methods run
    $x = $_
    # Use $x
    Write-Host $x
}