Capture email body as variable from wpcf7_mail_sent hook

I am trying to capture the completed email message body as a variable using a function created from the hook: wpcf7_mail_sent

The pre-completed body looks like this:

Message Body:
[your-message]
[your-name]

The completed body should look something like this (variables filled in by form input fields):

Message Body:
asdfasdf
qwerqwer

It seems that because the class WPCF7_Mail function compose is private I cannot access the completed variable.

This is the current direction I was heading in, however it only returns the pre email body and not the submitted variables:

add_action('wpcf7_mail_sent', 'cf7pp_after_send_mail');

	function cf7pp_after_send_mail( $contact_form ) {

	$array = (array) $contact_form;
	$values = array_values ($array);

	$body = $values[3]['mail'];

	echo "<pre>";
	print_r ($body);

}

Can anyone point me in the right direction on how to do this?

Thanks,
Scott

https://www.ads-software.com/plugins/contact-form-7/