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: comment_authorizer.rb
    path of file: ./repos/onebody/app/authorizers
    
    the code of the file until where you have to start completion: class CommentAuthorizer < ApplicationAuthor
    
  def updatable_by?(user)
    # my comment
    if resource.person == user
      true
    # admin with manage_comments privilege
    elsif user.admin?(:manage_comments)
      true
    end