.. efun:: object blueprint()
  object blueprint(string|object ob)
  :experimental:

  The efuns returns the blueprint for the given object :arg:`ob`, or for the current object if :arg:`ob` is not specified.

  If the blueprint is destructed, or its program replaced, the efun returns 0.

  For objects with replaced programs, the efun returns the blueprint for the replacement program. In :macro:`__COMPAT_MODE__` the returned blueprint does not start with a "/".

  .. usage::

    ::

      blueprint("/std/thing"))               -> /std/thing
      blueprint(find_object("/std/thing"))   -> /std/thing
      blueprint(clone_object("/std/thing"))  -> /std/thing

  :history 3.2.9 introduced:

  .. seealso:: :efun:`clones`, :efun:`clone_object`