@Override
  protected Collection<PyElement> moveMembers(@NotNull final PyClass from,
                                              @NotNull final Collection<PyMemberInfo<PyTargetExpression>> members,
                                              final PyClass @NotNull ... to) {
    return moveAssignments(from, Collections2
      .filter(Collections2.transform(fetchElements(members), ASSIGNMENT_TRANSFORM), NotNullPredicate.INSTANCE),
                           to);
  }
@Override
  protected Collection<PyElement> moveMembers(@NotNull final PyClass from,
                                              @NotNull final Collection<PyMemberInfo<PyTargetExpression>> members,
                                              final PyClass @NotNull ... to)