Returns names of all functions declared in Powershell file, excluding all nested functions

Find-FunctionSimple.ps1

function Find-FunctionSimple {

    Param(
        [Parameter( Mandatory )]
        [AllowEmptyString()]
        [String] 
        $Text
    )
    
    
    $ast = [System.Management.Automation.Language.Parser]::ParseInput(
            $Text, 
            [Ref] $Null, 
            [Ref] $Null
    )

    $Functions = $ast.FindAll(
            { $Args[0] -is [System.Management.Automation.Language.FunctionDefinitionAst] },
            $False
    ) 
    
    $Functions | ForEach-Object Name
    
}