'org.specs2:specs2-matcher-extra_2.11:2.4.13'
<dependency>
<groupId>org.specs2</groupId>
<artifactId>specs2-matcher-extra_2.11</artifactId>
<version>2.4.13</version>
</dependency>
<dependency org="org.specs2" name="specs2-matcher-extra_2.11" rev="2.4.13"/>
"org.specs2", "specs2-matcher-extra_2.11", "2.4.13"