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

require_relative "core"

module ROM
  module Components
    # @api public
    class Relation < Core
      # @!attribute [r] constant
      #   @return [.new] Relation instance builder (typically a class)
      option :constant, type: Types.Interfa
    
      def build
        constant.use(:changeset)
        constant.use(:registry_reader, relations: registry.relation_ids)

        # Define view methods if there are any registered view components for this relation
        local_components.views(relation_id: id).each do |view|
          view.define(constant)
        end

        apply_plugins

        constant.new(inflector: inflector, registry: registry, **plugin_options)
      end