PowerShell_Scripts/profile.d/FunctionName.class.ps1

class FunctionName: System.Management.Automation.IValidateSetValuesGenerator {
  static [string[]] _GetValidValues([string]$wordToComplete,[bool]$Strict) {
    $local:possibleValues = Get-Command -Type Function | Select-Object -ExpandProperty Name
    return $(Get-PossibleArguments -WordToComplete $wordToComplete -FullValueSet $possibleValues -Strict:$Strict );
  }
   static [String[]] _GetValidValues([string]$wordToComplete,[switch]$Strict) {
    return $(Get-PossibleArguments -WordToComplete $wordToComplete -FullValueSet $(Get-Command -Type Function | Select-Object -ExpandProperty Name) -Strict:$Strict)
#   $local:possibleValues = 
#   if( $wordToComplete ) {
#     $possibleValues = $possibleValues | Where-Object { $_ -match $wordToComplete }
#     if( -not $strict -and ($wordToComplete -notin $possibleValues) ) {
#       $possibleValues = $( $wordToComplete; $possibleValues )
#     }
#   }
#   return $possibleValues
  }
  
  [String[]] GetValidValues() {
    return [FunctionName]::_GetValidValues('',$true)
  }
}