[racket] Custom Keybindings - Editor Insert Poofed

Updated to the latest Racket master in git and some of my key bindings are
failing.

Typical example.
(keybinding "c:\\" (λ (editor evt) (send editor insert "λ")))

The key binding is invoked, however, I'm seeing the following in a pop-up.

Error running keybinding.
send: no such method
method name: insert
class name: cts/version/tool.rkt:176:9

Taking the error at face value, the insert method has on the editor class
is poof.  Did the editor% class / interface get overhauled?

Ray
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