Passing switches to child functions within PowerShell

Execute.ps1

# this is the final (child) function being called
function Invoke-Foo {
    [cmdletbinding()]
    param([switch] $Custom)
    Write-Host 'Hello world'
    Write-Verbose 'I''m a verbose message'
    Write-Debug 'I''m a debug message' #this will pause execution

    if($Custom.IsPresent){
        Write-Host 'I''m a custom message'
    }
    Write-Host #just here to add a line break
}

# this is the test function used to pass switch parameters
function Test-Helper {
    [cmdletbinding()]
    param([switch] $Custom)

    # notice I'm only passing custom switches to Invoke-Foo
    Invoke-Foo -Custom:$Custom
}

# ---------------------------------------
# calling the test helper to demonstrate passing switches

# without any switches
Test-Helper

# with custom switch
Test-Helper -Custom

# with -verbose switch
Test-Helper -Verbose

# with -debug switch
Test-Helper -Debug

Results.txt

This is the output after running Execute.ps1
==============================================

Hello world

Hello world
I'm a custom message

Hello world
VERBOSE: I'm a verbose message

Hello world
DEBUG: I'm a debug message

Good!