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: 20151215033050_add_bank_accounts_endpoint.rb
    path of file: ./repos/catarse/db/migrate
    
    the code of the file until where you have to start completion: class AddBa
    
  def down
    execute <<-SQL
DROP VIEW "1".bank_accounts;
REVOKE SELECT ON public.project_accounts FROM admin, web_user;
REVOKE SELECT ON public.banks FROM admin, web_user;
    SQL
  end