function Get-VSComponentManifest
{
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory = $true)] [hashtable] $PackageParameters,
        [PSObject] $ChannelReference,
        [System.Collections.IDictionary] $ChannelManifest,
        [switch] $UseInstallChannelUri
    )

    # look in LayoutPath only if --noWeb
    if (-not $packageParameters.ContainsKey('noWeb'))
    {
        Write-Debug 'Not looking in LayoutPath because --noWeb was not passed in package parameters'
        $layoutPath = $null
    }
    else
    {
        $layoutPath = Resolve-VSLayoutPath -PackageParameters $PackageParameters
    }

    # https://docs.microsoft.com/en-us/visualstudio/install/use-command-line-parameters-to-install-visual-studio?view=vs-2017#layout-options
    if ($packageParameters.ContainsKey('installCatalogUri'))
    {
        <#
            Advanced install options: Parameter --installCatalogUri <uri>

            Optional: The URI of the catalog manifest to use for the installation. If specified, the channel manager attempts to download
            the catalog manifest from this URI before using the URI in the install channel manifest. This parameter is used to support offline
            install, where the layout cache will be created with the product catalog already downloaded. This can be used for the install command;
            it is ignored for other commands.
        #>
        Write-Debug 'Obtaining the installCatalogUri from the Parameters'
        $installCatalogUri = $packageParameters['installCatalogUri']

        if ([string]::IsNullOrEmpty($installCatalogUri))
        {
            Write-Verbose 'The installCatalogUri parameter was present in package parameters, but empty. The component manifest will be loaded from the url supplied in the channel manifest (default behavior).'
            # If the installCatalogUri is null continue with the url from the ChannelManifest as the Microsoft documentation says.
        }
        else 
        {
            try
            {
                Write-Verbose 'Attempting to obtain the component manifest from installCatalogUri provided via package parameters'
                return Get-VSManifest -Description 'catalog manifest' -Url $installCatalogUri -LayoutFileName 'Catalog.json' -LayoutPath $layoutPath
            }
            catch
            {
                # The catalog manifest could not be downloaded from the installCatalogUri.
                # Catch the error and continue with the url from the ChannelManifest as the Microsoft documentation says.
                $_ | Format-List -Property * -Force | Out-String -Width 1000 | Write-Warning
                Write-Verbose "Failed to obtain the component manifest from installCatalogUri provided via package parameters ($installCatalogUri). The component manifest will be loaded from the url supplied in the channel manifest (default behavior)."
            }
        }
    }

    if ($null -eq $ChannelManifest)
    {
        Write-Debug 'Obtaining the channel manifest'
        $ChannelManifest = Get-VSChannelManifest -PackageParameters $PackageParameters -ChannelReference $ChannelReference -LayoutPath $layoutPath -UseInstallChannelUri:$UseInstallChannelUri
    }

    Write-Debug 'Parsing the channel manifest'
    $url, $checksum, $checksumType = Get-VSChannelManifestItemUrl -Manifest $ChannelManifest -ChannelItemType 'Manifest'

    if ($null -eq $url)
    {
        Write-Verbose 'Unable to determine the catalog manifest url'
        return $null
    }

    # -Checksum and -ChecksumType are not passed, because the info from the channel manifest seems bogus - does not match reality
    $catalogManifest = Get-VSManifest -Description 'catalog manifest' -Url $url -LayoutFileName 'Catalog.json' -LayoutPath $layoutPath

    return $catalogManifest
}