lib/active_model_serializers_validator.rb
require 'json-schema'
require 'active_support'
require 'active_support/core_ext/object/json'
require 'active_model/serializer'
require 'active_model/serializer/validator/errors'
require 'active_model/serializer/validator/mixin'
require 'active_model/serializer/validator/version'
# Inject the mixin in the ActiveModel::Serializer class
ActiveModel::Serializer.send :include, ActiveModel::Serializer::Validator::Mixin