private void addRaiseFrom() {
    extend(CompletionType.BASIC,
           psiElement()
             .withLanguage(PythonLanguage.getInstance())
             .and(PY3K)
             .afterLeaf(psiElement().inside(PyRaiseStatement.class)),
           new PyKeywordCompletionProvider(PyNames.FROM));
  }
private void addRaiseFrom()