<# SSRS / PBIRS #>
Register-ArgumentCompleter -ParameterName ReportServerUri -ScriptBlock {
    "http://localhost:8016/Reports_SQL2016", 'http://localhost:8081/PBIRServer' | ForEach-Object {
    $CompletionText = $_
    New-Object System.Management.Automation.CompletionResult (
              $CompletionText,
              $_,
              'ParameterValue',
              "$_ (SSRSInstance)"
                )
          }
};
<# When the Parameter is called -Destination we do this #>
Register-ArgumentCompleter -ParameterName Destination -ScriptBlock {
    param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)

    if ($fakeBoundParameter.ContainsKey('ReportServerUri')) {
    (Get-RsFolderContent -ReportServerUri $($fakeBoundParameter.ReportServerUri) -Path /).Name | ForEach-Object {
    $CompletionText = $_
    New-Object System.Management.Automation.CompletionResult (
              $CompletionText,
              $_,
              'ParameterValue',
              "$_ (SSRS Item)"
                )
         }
    }
}; 
<# When the Parameter is called -Path we do this #>
Register-ArgumentCompleter -ParameterName RsFolder -ScriptBlock {
    param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)

    if ($fakeBoundParameter.ContainsKey('ReportServerUri')) {
    (Get-RsFolderContent -ReportServerUri $($fakeBoundParameter.ReportServerUri) -Path /).Name | ForEach-Object {
    $CompletionText = $_
    New-Object System.Management.Automation.CompletionResult (
              $CompletionText,
              $_,
              'ParameterValue',
              "$_ (SSRS Item)"
                )
         }
    }
};
<# When the Parameter is called -DestinationFolder we do this #>
Register-ArgumentCompleter -ParameterName DestinationFolder -ScriptBlock {
    param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)

    if ($fakeBoundParameter.ContainsKey('ReportServerUri')) {
    (Get-RsFolderContent -ReportServerUri $($fakeBoundParameter.ReportServerUri) -Path /).Name | ForEach-Object {
    $CompletionText = $_
    New-Object System.Management.Automation.CompletionResult (
              $CompletionText,
              $_,
              'ParameterValue',
              "$_ (SSRS Item)"
                )
         }
    }
};