@NotNull
  private static PyFunction transformDefinition(@NotNull PyFunction method) {
    PyParameter[] parameters = method.getParameterList().getParameters();
    if (parameters.length > 0) {
      parameters[0].delete();
    }
    PyClass topmostClass = PsiTreeUtil.getTopmostParentOfType(method, PyClass.class);
    assert topmostClass != null;
    PsiElement copy = method.copy();
    method.delete();
    return (PyFunction)topmostClass.getParent().addBefore(copy, topmostClass);
  }
@NotNull
  private static PyFunction transformDefinition(@NotNull PyFunction method)