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

# This module searches and redacts sensitive information in
# redactab
    
  def redact_field!(field)
    text = public_send(field) # rubocop:disable GitlabSecurity/PublicSend
    return unless text.present?

    redacted = text.gsub(UNSUBSCRIBE_PATTERN, '/sent_notifications/REDACTED/unsubscribe')

    public_send("#{field}=", redacted) # rubocop:disable GitlabSecurity/PublicSend
  end