#Sub.psm1:
  class Sub {
    [int] $Value
  }

#modrepo.psm1:
  using module .\Sub.psm1

  function Get-Sub { 
     [Sub]@{
         Value = 42
     }
  }

Import-Module modrepo
Get-Sub

#Sub.psm1:
  class Sub {  
    [string] $Name # added field
    [int] $Value
  }

#modrepo.psm1:
  using module .\Sub.psm1

  function Get-Sub{ 
     [Sub]@{
         Name = ‘Staffan’ # added field
         Value = 42
     }
  }

#Then

Remove-Module -force modrepo
Import-Module -force modrepo
Get-Sub 

Name                           Value                                                                                                                                                       
----                           -----                                                                                                                                                       
PSVersion                      5.1.14393.206                                                                                                                                               
PSEdition                      Desktop                                                                                                                                                     
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                                                                                                                     
BuildVersion                   10.0.14393.206                                                                                                                                              
CLRVersion                     4.0.30319.42000                                                                                                                                             
WSManStackVersion              3.0                                                                                                                                                         
PSRemotingProtocolVersion      2.3                                                                                                                                                         
SerializationVersion           1.1.0.1