class Protocol::HTTP::Body::Wrapper

def self.wrap(message)

@returns [Wrapper | Nil] the wrapped body or `nil`` if the body was `nil`.
@parameter message [Request | Response] the message to wrap.

Wrap the body of the given message in a new instance of this class. 
def self.wrap(message)
	if body = message.body
		message.body = self.new(body)
	end
end