Trying to create a Powershell (pwsh.exe) equivalent to the Bash internal "typset -f"

typsetf.ps1

#------------------------------------------------------------------------------
# Trying to create a PoSh equivalent to the Bash internal "typset -f"
# Trying to create a Powershell (pwsh.exe) equivalent to the Bash internal "typset -f"
#------------------------------------------------------------------------------
# From: 
# 	https://stackoverflow.com/questions/40967449/get-list-of-functions-from-script
# 	https://stackoverflow.com/a/57635570/
# Usage:
# 	Write-Host [System.String[]]$FX_DEFS = Get-ScriptFunctionDefinitions -Path "$($PSCommandPath | Split-Path)/Functions.ps1"
# 	Write-Host [System.String[]]$FX_DEFS = Get-ScriptFunctionDefinitions -Path "$($PSCommandPath | Split-Path)/Microsoft.PowerShell_profile.ps1"
#------------------------------------------------------------------------------
function Get-ScriptFunctionNames {
    param (
        [parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)]
        [AllowEmptyString()]
        [AllowNull()]
        [System.String]
        $Path
    )
    Process{
        [System.Collections.Generic.List[String]]$FX_NAMES = New-Object System.Collections.Generic.List[String]
        if(!([System.String]::IsNullOrWhiteSpace($Path))) { 
            Select-String -Path "$Path" -Pattern "function" | 
            ForEach-Object {
                [System.Text.RegularExpressions.Regex] $regexp = New-Object Regex("(function)( +)([\w-]+)")
                [System.Text.RegularExpressions.Match] $match = $regexp.Match("$_")
                if($match.Success) {
                    $FX_NAMES.Add("$($match.Groups[3])")
                }
            }
        }
        return ,$FX_NAMES.ToArray()
    }
}

function Get-ScriptFunctionDefinitions {
    param (
        [parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)]
        [AllowEmptyString()]
        [AllowNull()]
        [System.String]
        $Path
    )
    Process{
        [System.Collections.Generic.List[String]]$FX_DEFS = New-Object System.Collections.Generic.List[String]
        if(!([System.String]::IsNullOrWhiteSpace($Path))) {
            Import-Module -Name "$Path" -Force 
        }
        # NOTE: Use of previous function here:
        $names = Get-ScriptFunctionNames -Path $Path
        Get-ChildItem "function:" | Where-Object { $_ -in $names } | ForEach-Object{
            #$FX_DEFS.Add("function $($_.Name) { $($_.Definition) };")
            $FX_DEFS.Add("function $($_.Name) { $($_.Definition) };`n")
        }
        return ,$FX_DEFS.ToArray()
    }
}