Get SourceCode of any powershell cmdlet/function by using the command metadata

Get-CommandSourceCode.ps1

function Get-CommandSourceCode
{
    <#
    .SYNOPSIS
    Get SourceCode of an powershell cmdlet
    .DESCRIPTION
    Get SourceCode of an powershell cmdlet
    .PARAMETER Command
    Must be a valid powershell cmdlet/function
    .EXAMPLE
    Get-CommandSourceCode -Command "Get-Process"
    .EXAMPLE
    "Get-Process" | Get-CommandSourceCode
    .NOTES
    Last Modified: Aug 11, 2021
    Version: 1.1
    #>
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true,
            ValueFromPipelineByPropertyName = $true,
            ValueFromPipeline = $True
        )]
        [ValidateScript(
            {
                if ( -Not (Get-Command $_) )
                {
                    throw "ERROR: Command '$_' not found"
                }
                return $true
            }
        )]
        [string]
        $Command
    )
    $Metadata = [System.Management.Automation.CommandMetadata]::new((Get-Command $Command))
    [System.Management.Automation.ProxyCommand]::Create($MetaData)
}

Example of metadata for Get-Process:

$metadata

Name                    : Get-Process
CommandType             : Microsoft.PowerShell.Commands.GetProcessCommand
DefaultParameterSetName : Name
SupportsShouldProcess   : False
SupportsPaging          : False
PositionalBinding       : True
SupportsTransactions    : False
HelpUri                 : https://go.microsoft.com/fwlink/?LinkID=2096814
RemotingCapability      : SupportedByCommand
ConfirmImpact           : None
Parameters              : {[Name, System.Management.Automation.ParameterMetadata], [Id, System.Management.Automation.ParameterMetadata], [InputObject, System.Management.Automation.ParameterMetadata], [IncludeUserName,
                          System.Management.Automation.ParameterMetadata]…}

where the source code?