Show-Command crashes when clicking "Show Details" on a command #25556

Prerequisites

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• Make sure you are able to repro it on the latest released version
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• Refer to Differences between Windows PowerShell 5.1 and PowerShell.

Steps to reproduce

Repro steps

1. Run Show-Command in PowerShell 7.4
2. Click a command
3. Click "Show Details" (show in the screenshot below)

Reason

The GetImportModuleCommand method was removed in the PR #20593 (see https://github.com/PowerShell/PowerShell/pull/20593/files#diff-6049789826a31f0b0d8365b339ae7b8fdd8c977fec824cb44397f744adeba639L499).
However, the Show-Command depends on this method to work for the "Show Details" button.

Expected behavior

No crash, no freezing. The details of the command will be shown.

Actual behavior

The GUI freezes and a NullReferenceException is thrown from `Show-Command` in PowerShell.

Error details

PS:10> Show-Command
Show-Command: Object reference not set to an instance of an object.

Environment data

PS:11> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.4.7
PSEdition                      Core
GitCommitId                    7.4.7
OS                             Microsoft Windows 10.0.26100
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visuals

No response