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: schema_dot_org.rb
    path of file: ./repos/schema-dot-org/lib
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'json'
require 'validated_object'

#
# Abstract base class for all the Schema.org types.
#
module SchemaDotOrg
  class SchemaType < ValidatedObject::Base
    ROOT_ATTR = { "@context" => "https://schema.org" }.freeze
    UNQUALIFIED_CLASS_NAME_REGEX = /([^:]+)$/


    def to_s
      json_string = to_json_ld(pretty: (!rails_production? && !ENV['SCHEMA_DOT_ORG_MINIFIED_JSON']))

      # Mark as safe if we're in Rails
      if json_string.respond_to?(:html_safe)
        json_string.html_safe
      else
        json_string
      end
    end


    def to_json_ld(pretty: false)
      "<script type=\"application/ld+json\">\n" + to_json(pretty: pretty, as_root: true) + "\n</script>"
    end


    def to_json(pretty: false, as_root: false)
      structure = as_root ? ROOT_ATTR.merge(to_json_
    
    def attrs_and_values
      attrs.map do |attr|
        # Clean up and andle the `query-input` attribute, which
        # doesn't follow the normal camelCase convention.
        attr_name   = snake_case_to_lower_camel_case(attr.to_s.delete_prefix('@')).sub('queryInput', 'query-input')
        attr_value = instance_variable_get(attr)

        [attr_name, resolve_value(attr_value)]
      end.to_h
    end


    def resolve_value(value)
      if value.is_a?(Array)
        value.map { |v| resolve_value(v) }

      elsif value.is_a?(Date)
        value.to_s

      elsif is_schema_type?(value)
        value.to_json_struct
        
      else
        value
      end
    end


    def snake_case_to_lower_camel_case(snake_case)
      snake_case.to_s.split('_').map.with_index { |s, i| i.zero? ? s : s.capitalize }.join
    end


    def attrs
      instance_variables.reject{ |v| [:@validation_context, :@errors].include?(v) }
    end


    def is_schema_type?(object)
      object.class.module_parent == SchemaDotOrg
    end


    def rails_production?
      defined?(Rails) && Rails.env.production?
    end
  end