Is it possible to know if a package is (already) wrapped?

 Hello, I've just written a procedure with wraps a package (whose name is given in input) using dbms_ddl.
So far so good. The problem is that, if you for mistake calls the procedure on the same package
twice, it becomes unusable (it seems that create_wrapped doesn't detect that the source is already wrapped and makes a mess in output).
So I am asking if is there any way to know that a package source (i am reading user_source which doesn't seem to contain this information)
is already wrapped ?
thanks in advance
Bye
Nicola