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: 20151125195635_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
    path of file: ./repos/SlideHub/db/migrate
    
    the code of the file until where you have to start completion: # This migration comes from acts_as_taggable_on_engine (originally 1)
cla
    
  def self.up
    say_with_time('Create tags') do
      self.create_tags
    end
    say_with_time('Create taggings') do
      self.create_taggings
    end
  end