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: 20190620000004_add_more_column_types_to_wands.rb
    path of file: ./repos/sorbet-rails/spec/support/v5.2/db/migrate
    
    the code of the file until where you have to start completion: # typed: true
class AddMoreColumnTypesToWands < ActiveRecord::Migration[5.2]
  def change
    
  def change
    add_column :wands, :flexibility,    :float,   null: false, default: 0.5
    add_column :wands, :hardness,       :decimal, null: false, precision: 10, scale: 10, default: 5
    add_column :wands, :reflectance,    :decimal, null: false, precision: 10, scale: 0, default: 0.5
    add_column :wands, :broken,         :boolean, null: false, default: false
    add_column :wands, :broken_at,      :datetime, null: true
    add_column :wands, :chosen_at_date, :date
    add_column :wands, :chosen_at_time, :time
    # JSON column type is only supported on 5.2 or higher
    unless ['5.0', '5.1'].include?(ENV['RAILS_VERSION'])
      add_column :wands, :spell_history,  :json
      add_column :wands, :maker_info,     :json,    null: false, default: '{}'
    end