lib/Get-3rdCompletions.ps1

function Get-3rdCompletions([string] $WordToComplete, [string] $Command, [string] $CommandSubPart) {
    if (-not $options) {
        . $PSScriptRoot\..\options.ps1
    }

    $searchBlock = { $_ -like "$WordToComplete*" }
    $completions = @()

    # Command option's values
    if ($options[$Command]) {
        $completions += $options[$Command].Keys | Where-Object $searchBlock | ForEach-Object {
            [System.Management.Automation.CompletionResult]::new($_, $_, 'ParameterName', $_)
        }
    }

    return $completions
}