<groupId>org.opendaylight.yangtools</groupId>
<artifactId>concepts</artifactId>
</dependency>
+ <dependency>
+ <groupId>org.opendaylight.yangtools</groupId>
+ <artifactId>util</artifactId>
+ </dependency>
<dependency>
<groupId>org.opendaylight.yangtools</groupId>
<artifactId>yang-common</artifactId>