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: email_channel_finder.rb
    path of file: ./repos/chatwoot/app/finders
    
    the code of the file until where you have to start completion: class EmailChannelFinder
  inclu
    
  def perform
    channel = nil

    recipient_mails.each do |email|
      normalized_email = normalize_email_with_plus_addressing(email)
      channel = Channel::Email.find_by('lower(email) = ? OR lower(forward_to_email) = ?', normalized_email, normalized_email)

      break if channel.present?
    end
    channel
  end