Resource Acquisition Is Initialization
libraryDependencies += "com.thoughtworks.raii" %%% "covariant" % "1.0.0-M6"
import $ivy.`com.thoughtworks.raii::covariant:1.0.0-M6`
<dependency> <groupId>com.thoughtworks.raii</groupId> <artifactId>covariant_sjs0.6_2.12</artifactId> <version>1.0.0-M6</version> </dependency>
compile group: 'com.thoughtworks.raii', name: 'covariant_sjs0.6_2.12', version: '1.0.0-M6'
ivy"com.thoughtworks.raii::covariant:1.0.0-M6"