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: can_communicate_all_parties_policy.rb
    path of file: ./repos/discourse/plugins/chat/app/policies/chat/direct_message_channel
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class Chat::DirectMessageChannel::CanCommunicateAllPartiesPolicy < PolicyBase
  delegate :target_users, :user_comm_screener, to: :context

  def call
    acting_user_can_message_all_target_users
    
  def reason
    if !acting_user_can_message_all_target_users?
      I18n.t("chat.errors.not_accepting_dms", username: actor_cannot_message_user.username)
    elsif !acting_user_not_preventing_messages_from_any_target_users?
      I18n.t(
        "chat.errors.actor_preventing_target_user_from_dm",
        username: actor_disallowing_pm_user.username,
      )
    elsif !acting_user_not_ignoring_any_target_users?
      I18n.t("chat.errors.actor_ignoring_target_user", username: actor_ignoring_user.username)
    elsif !acting_user_not_muting_any_target_users?
      I18n.t("chat.errors.actor_muting_target_user", username: actor_muting_user.username)
    end