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_fetch_email_service.rb
    path of file: ./repos/chatwoot/app/services/imap
    
    the code of the file until where you have to start completion: require 'net/imap'

class Imap::BaseFetchEmailService
  pattr_initialize [:channel!]

  def 
    
  def process_message_id(message_id_with_seq)
    seq_no, message_id = message_id_with_seq

    if message_id.blank?
      Rails.logger.info "[IMAP::FETCH_EMAIL_SERVICE] Empty message id for #{channel.email} with seq no. <#{seq_no}>."
      return
    end