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: issuable_base_service.rb
    path of file: ./repos/gitlabhq/app/services
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class IssuableBaseService < ::BaseContainerServ
    
  def assign_requested_assignees(issuable)
    return if issuable.is_a?(Epic)

    assignee_ids = process_assignee_ids(params, existing_assignee_ids: issuable.assignee_ids)
    if ids_changing?(issuable.assignee_ids, assignee_ids)
      params[:assignee_ids] = assignee_ids
      issuable.touch
    end