If it's a bit complicated...mmm...I'll try to explain myself (and why
\setmymodule[print,*])...the issue goes through the following: In the
real implementation, when you execute "myenv" it stores in a "\seq_var"
the entire structure except the first level, including "myenv*" which
can be nested in it, when you execute "myenv*" it also saves the entire
structure which can contain "myenv" in a "\seq_var" " (without *)
nested...When running \printhis (without *) it opens with \begin{myenv}
\seq_map_inline:cn ... \end{myenv} so if there is "myenv*" in "\seq_var" and I