What's the equivalent -Function to diw in vi mode

[sharpchen]

I've tried to set a keymap to perform the same as diw. I thought it should be -Function DeleteWord but this does not behave the same.

Set-PSReadLineKeyHandler -Chord ' , ' -Function DeleteWord -ViMode Command

[sharpchen]

Set-PSReadLineKeyHandler -Chord ' , ' -ViMode Command -ScriptBlock {
    [Microsoft.PowerShell.PSConsoleReadLine]::ForwardChar()
    [Microsoft.PowerShell.PSConsoleReadLine]::BackwardWord()
    [Microsoft.PowerShell.PSConsoleReadLine]::DeleteWord()
}