static Collection<PyElement> moveAssignmentsImpl(@NotNull final PyClass from,
                                                   @NotNull final Collection<? extends PyAssignmentStatement> statements,
                                                   final PyClass @NotNull ... to) {
    //TODO: Copy/paste with InstanceFieldsManager. Move to parent?
    final Collection<PyElement> result = new ArrayList<>();
    for (final PyClass destClass : to) {
      result.addAll(PyClassRefactoringUtil.copyFieldDeclarationToStatement(statements, destClass.getStatementList(), destClass));
    }
    deleteElements(statements);
    return result;
  }
static Collection<PyElement> moveAssignmentsImpl(@NotNull final PyClass from,
                                                   @NotNull final Collection<? extends PyAssignmentStatement> statements,
                                                   final PyClass @NotNull ... to)