# Validate a Serializable input
	fun validate_json(json: Serializable): Bool do
		if not json isa JsonObject then
			validation.add_error("document", "Expected JsonObject got `{json.class_name}`")
			return false
		end
		validation.object = json
		for validator in validators do
			var res = validator.validate_field(self, json)
			if not res then return false
		end
		return true
	end