Private/Write-CustomHost.ps1

# Will be called in VM
function Global:Write-CustomHost {
    [CmdletBinding()]
    <#
    .SYNOPSIS
        Initializes the newly created VM
    .DESCRIPTION
        ...
    #>

    param(
        [Alias("Message")] 
        [string] $msg
    )
    process {
        $currDatetime = (Get-Date).ToString("yyyy:MM:dd HH:mm:ss")
        Write-Host "$($currDatetime): $msg"
    }
}