You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: base_contract_patch.rb
    path of file: ./repos/openproject/modules/backlogs/lib/open_project/backlogs/patches/versions
    
    the code of the file until where you have to start completion: #-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2024 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General 
    
  def user_allowed_to_manage
    changed_settings = model.version_settings.select(&:changed?)

    super unless !model.changed? && changed_settings.any?

    # Make sure the version_settings (column=left|right|none) can only be stored
    # for projects the user has the :manage_versions permission in.
    changed_settings.each do |version_setting|
      unless user.allowed_in_project?(:manage_versions, Project.find_by(id: version_setting.project_id))
        errors.add :base, :error_unauthorized
      end
    end