How can I remove a FileTransferred event handler from a WinSCP Session object?

I made a small PowerShell wrapping script for the WinSCP module that suites my needs. Like in the example for synchronizing local and remote folders mine uses a file transferred event to log session events.

$fileTransferedEvent = {Receive-FileTransferredEvent $_}
$session.add_FileTransferred($fileTransferedEvent)

The example disposes the session when it is done. My logic keeps the session open until I choose to be done with it so I can use the same session in other cmdlet call.

This creates an issue if a other cmdlets (or even calling the same one again) also use add_FileTransferred(). The event gets added again which triggers X times the output where X is how many times the method is called.

I found a partner method called remove_FileTransferred() but I do not know how to use it

Name                   MemberType Definition                                                           
----                   ---------- ----------                                                           
add_FileTransferred    Method     void add_FileTransferred(WinSCP.FileTransferredEventHandler value)   
remove_FileTransferred Method     void remove_FileTransferred(WinSCP.FileTransferredEventHandler value)

They both accept the same values so I thought maybe I could pass it a definition of the the handler but that does not seem to work i.e. $session.remove_FileTransferred($fileTransferedEvent) did not do the job. Nor does it error either.

How can I remove file transferred event handlers on Winscp.Session objects?