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: base.rb
    path of file: ./repos/administrate/lib/administrate/field
    
    the code of the file until where you have to start completion: require_relative "deferred"
require "active_support/core_ext/string/inflections"

module Administrate
  module Field
    class Base
      def self.with_options(options = {})
        Deferred.new(self, options)
      end

      def self.html_class
        field_type.dasherize
      end

      def self.associative?
        self < Associative
      end

      def self.
    
      def required?
        return false unless resource.class.respond_to?(:validators_on)

        resource.class.validators_on(attribute).any? do |v|
          next false unless v.instance_of?(ActiveRecord::Validations::PresenceValidator)

          options = v.options
          next false if options.include?(:if)
          next false if options.include?(:unless)

          if (on_option = options[:on])
            if on_option == :create && !resource.persisted?
              next true
            end

            if on_option == :update && resource.persisted?
              next true
            end