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: miq_filter.rb
    path of file: ./repos/manageiq/app/models
    
    the code of the file until where you have to start completion: module MiqFilter
  ALLOWED_DESCENDANT_CLASSES_FROM_MODEL = %w[ExtManagementSystem].freeze

  def self.belongsto2object(tag)
    belongsto2object_list(tag).last
  end

  def self.belongsto2path_human(tag)
    tag.split("/").map { |x| x.split("|").second }.compact.join(" -> ")
  end

  def self.find_descendant_class_by(klass, name)
    if ALLOWED_DESCENDANT_CLASSES_FROM_MODEL.include?(klass.to_s) && (descendant_class = klass.try(:belongsto_descendant_class, name))
      return descendant_class.constantize
    else
      _log.warn("Unable to find descendant class for belongsto filter: #{klass}/#{name}")
    end

    nil
  end

  def self.find_object_by_special_class(klass, name)
    if (descendant_class = find_descendant_class_by(klass, name)) && descendant_class.respond_to?(:find_object_for_belongs_to_filter)

    
  def self.belongsto2object_list(tag)
    # /belongsto/ExtManagementSystem|<name>/EmsCluster|<name>/EmsFolder|<name>
    raise _("invalid tag: %{tag}") % {:tag => tag} unless tag.starts_with?("/belongsto/ExtManagementSystem")

    parts = tag.split("/")[2..-1]
    depth = parts.size - 1 # ancestry uses 0 based depth

    # Get the root EMS object
    # TODO: For tree queries deeper than 1, we don't actually need the ems object,
    #       so find a way to just get the id
    ems_class, ems_name = parts.first.split("|", 2)
    ems = find_object_by_name(ems_class, ems_name)

    if ems.nil?
      _log.warn("lookup for klass=#{ems_class.to_s.inspect} with name=#{ems_name.inspect} failed in tag=#{tag.inspect}")
      return []
    end

    return [ems] if depth == 0

    # Get the leaf node object for this EMS
    leaf_class, leaf_name = parts.last.split("|", 2)
    leaves = leaf_class.constantize
      .includes(:all_relationships)
      .where(:name => leaf_name, :ems_id => ems.id)

    # If multiple leaves come back, filter by depth, and then find which one has
    #   the valid path. It's possible multiple leaves could be at the same depth.
    leaves.each do |leaf|
      next unless leaf.depth == depth

      # Get the full path from the leaf object to the root
      result = leaf.with_relationship_type("ems_metadata") { leaf.path }

      # Verify that the records match what's in the provided tag
      result_parts = result&.map { |o| "#{o.class.base_model.name}|#{o.name}" }
      return result if result_parts == parts
    end

    # Nothing was found from any of the candidates
    _log.warn("lookup failed for tag=#{tag.inspect}")
    []
  end