'org.webjars.npm:bootstrap:4.0.0-alpha.2'
<dependency>
<groupId>org.webjars.npm</groupId>
<artifactId>bootstrap</artifactId>
<version>4.0.0-alpha.2</version>
</dependency>
<dependency org="org.webjars.npm" name="bootstrap" rev="4.0.0-alpha.2"/>
"org.webjars.npm", "bootstrap", "4.0.0-alpha.2"