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

module OnlineMigrations
  module BackgroundMigrations
    # @private
    class ResetCounters < BackgroundMigration
      attr_reader :model, :counters, :touch

      def initialize(model_name, counters, options = {})
        @model = Object.const_get(model_name, false)
        @counters = counters
        @touch = options[:touch]
      end

      def relation
      
    
      def count
        # Exact counts are expensive on large tables, since PostgreSQL
        # needs to do a full scan. An estimated count should give a pretty decent
        # approximation of rows count in this case.
        Utils.estimated_count(connection, model.table_name)
      end

      private
        def has_many_association(counter_association) # rubocop:disable Naming/PredicateName
          has_many_association = model.reflect_on_association(counter_association)

          if !has_many_association
            has_many = model.reflect_on_all_associations(:has_many)

            has_many_association = has_many.find do |association|
              counter_cache_column = association.counter_cache_column
              counter_cache_column && counter_cache_column.to_sym == counter_association.to_sym
            end

            counter_association = has_many_association.plural_name if has_many_association
          end
          raise ArgumentError, "'#{model.name}' has no association called '#{counter_association}'" if !has_many_association

          if has_many_association.is_a?(ActiveRecord::Reflection::ThroughReflection)
            has_many_association = has_many_association.through_reflection
          end