Start-Job: Call another functions in a script

example.ps1

function Base-Function {
    PARAM(
        [string]
        $PathToFile
    )

    if (Test-Path -Path $PathToFile) {
        Write-Host "Exist"
    }
}


function CopyFile {
    PARAM(
        [string]
        $SourcePath,

        [string]
        $TargetPath
    )

    Base-Function -PathToFile $SourcePath
    Base-Function -PathToFile $TargetPath

    Write-Host "I will copy file from $SourcePath to $TargetPath"
}

function Main-Function {

    $copyFileArgs = @{ 
        "SourcePath" = "C:\Windows\notepad.exe"
        "TargetPath" = "C:\Temp\notepad.exe"
    }

    Start-Job -ScriptBlock ${Function:CopyFile} -ArgumentList $copyFileArgs
}

Main-Function