function Get-ConfigurationDataTemplateExtends {
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory=$true)]
        [System.Collections.IDictionary]
        $ConfigurationData
    )

    $Extends = $null

    if(Test-ConfigurationDataDictionaryKey -Dictionary $ConfigurationData -Key "Metadata"){
        $Metadata = Get-ConfigurationDataDictionaryValue -Dictionary $ConfigurationData -Key "Metadata"
        if($Metadata -is [System.Collections.IDictionary] -and (Test-ConfigurationDataDictionaryKey -Dictionary $Metadata -Key "Extends")){
            $Extends = Get-ConfigurationDataDictionaryValue -Dictionary $Metadata -Key "Extends"
        }
    }

    if($null -eq $Extends -and (Test-ConfigurationDataDictionaryKey -Dictionary $ConfigurationData -Key "Extends")){
        $Extends = Get-ConfigurationDataDictionaryValue -Dictionary $ConfigurationData -Key "Extends"
    }

    if($null -eq $Extends){
        return @()
    }

    if($Extends -is [System.Array] -and $Extends -isnot [string]){
        return @($Extends)
    }

    return @($Extends)
}