Because the caller of an ensemble, the definition of the ensemble, and
the target command can all three have different namespaces, and because
the [info level 0] list may use only its first element alone to
identify the command (the arguments to the proc have to be
[lrange [info level 0] 1 end]) the only feasible solution
(maybe the only possible one?) is to fully qualify the command
name stored in framePtr->objv[0].

This adds yet another example to the list of ways Tcl deeply
insists that every command must have a fully qualified name. The
existing commands that lack one are bugs in need of fixing. TIP to come.