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: copy_trigger.rb
    path of file: ./repos/online_migrations/lib/online_migrations
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require "openssl"

module On
    
      def normalize_column_names(from_columns, to_columns)
        from_columns = Array.wrap(from_columns)
        to_columns = Array.wrap(to_columns)

        if from_columns.size != to_columns.size
          raise ArgumentError, "Number of source and destination columns must match"
        end