Execute a readline function without keybinding?

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http://unix.stackexchange.com – I was just reading the readline man-page and disovered a bunch of great commands I didn't know about. However, several don't have default key bindings. Is there a way to execute the unbound commands from the shell? I'm not asking how to bind the command in ~/.inputrc, but instead how to execute it as a "one off" from the shell or in a bash script. For example, the "dump-variables" command. Is there some command I can feed "dump-variables" to as an argument to have it executed? NOTE: Originally, posted on Server Fault, but advised to repost here. (HowTos)