Adding help help based on Get-Help comments for dynamic parameters

Question

Adding help help based on Get-Help comments for dynamic parameters

If I have a function with dynamic parameters, how can I add help based on comments so that when executed by the user, Get-Helpit will still show dynamic parameters?
for example Here is my function without any help based on comments.

function Test-DynamicParam{
  [CmdletBinding(PositionalBinding=$false)]
  param(
      [Parameter(Mandatory=$false)][string]$NamedStaticParam1,
      [Parameter(Mandatory=$false)][string]$NamedStaticParam2
  )
  dynamicparam {
      $paramDictionary = new-object -Type System.Management.Automation.RuntimeDefinedParameterDictionary

      $paramname = "NamedDynamicParam1"
      $values = 'foo','bar' #would normally get these dynamically
      $attributes = new-object System.Management.Automation.ParameterAttribute
      $attributes.ParameterSetName = "__AllParameterSets"
      $attributes.Mandatory = $true
      $attributeCollection = new-object -Type System.Collections.ObjectModel.Collection[System.Attribute]
      $attributeCollection.Add($attributes)
      $ValidateSet = new-object System.Management.Automation.ValidateSetAttribute($values)
      $attributeCollection.Add($ValidateSet)
      $dynParam = new-object -Type System.Management.Automation.RuntimeDefinedParameter($paramname, [string], $attributeCollection)

      $paramDictionary.Add($paramname, $dynParam)
      return $paramDictionary
  }

  process{
     $PSBoundParameters.NamedDynamicParam1
     $PSBoundParameters.NamedStaticParam1
     $PSBoundParameters.NamedStaticParam2
  }  
}

If I ran Get-Help Test-DynamicParam -Full, he gave me

NAME
    Test-DynamicParam
SYNTAX
    Test-DynamicParam -NamedDynamicParam1 {foo | bar} [-NamedStaticParam1 <string>] [-NamedStaticParam2 <string>]  [<CommonParameters>]
PARAMETERS
    -NamedDynamicParam1 <string>

        Required?                    true
        Position?                    Named
        Accept pipeline input?       false
        Parameter set name           (All)
        Aliases                      None
        Dynamic?                     true

    -NamedStaticParam1 <string>

        Required?                    false
        Position?                    Named
        Accept pipeline input?       false
        Parameter set name           (All)
        Aliases                      None
        Dynamic?                     false

    -NamedStaticParam2 <string>

        Required?                    false
        Position?                    Named
        Accept pipeline input?       false
        Parameter set name           (All)
        Aliases                      None
        Dynamic?                     false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer, PipelineVariable, and OutVariable. For more information, see 
        about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).
INPUTS
    None
OUTPUTS
    System.Object
ALIASES
    None
REMARKS
    None

but if I add help based on comments, for example:

function Test-DynamicParam{
    <#
    .SYNOPSIS
        A test for the dynamic parameter list populating
    .DESCRIPTION
        Using this for Stack Overflow
    .NOTES
        Adding comment-based help breaks the parameter and syntax help
    #>
    ...

The launch Get-Help Test-DynamicParam -Fullshows only static parameters in the SYNTAX section and the PARAMETERS section :

NAME
    Test-DynamicParam

SYNOPSIS
    A test for the dynamic parameter list populating


SYNTAX
    Test-DynamicParam [-NamedStaticParam1 <String>] [-NamedStaticParam2 <String>] [<CommonParameters>]


DESCRIPTION
    Using this for Stack Overflow


PARAMETERS
    -NamedStaticParam1 <String>

        Required?                    false
        Position?                    named
        Default value                
        Accept pipeline input?       false
        Accept wildcard characters?  false

    -NamedStaticParam2 <String>

        Required?                    false
        Position?                    named
        Default value                
        Accept pipeline input?       false
        Accept wildcard characters?  false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer, PipelineVariable, and OutVariable. For more information, see 
        about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216). 

INPUTS

OUTPUTS

NOTES


        Adding comment-based help breaks the parameter and syntax help


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