15eef186db61f74716c0a744bda8ef2734438c7a,grakn-migration/json/src/main/java/ai/grakn/migration/json/JsonMigrator.java,JsonMigrator,migrate,#,80

Before Change


        return readers.stream()
                .map(this::asString)
                .map(this::toJsonMap)
                .map(data -> template(template, data))
                .filter(Optional::isPresent)
                .map(Optional::get);
    }

    /**

After Change


        return readers.stream()
                .map(this::asString)
                .map(this::toJsonMap)
                .flatMap(data -> template(template, data).stream());
    }

    /**