provided, then rename the object with the given alias.

If source=True, use these options:
  If enclosing=True, then also return any enclosing code.
  If force=True, catch (TypeError,IOError) and try to use import hooks.
  If lstrip=True, ensure there is no indentation in the first line of code.

If source=False, use these options:
  If enclosing=True, get the import for the outermost enclosing callable.
  If force=True, then don't test the import string before returning it.
  If builtin=True, then force an import for builtins where possible.
TF)