During plugin development time, it's possible that you need dependencies to another plugin or a spécific API. It's necessary to add dependencies, plugins et APIs, in pom.xml file plugin.
case in point :
Consider plugin need the Document plugin to work. It's necessary to add dependency following in pom.xml file :
... <dependencies> ... <dependency> <groupId>fr.paris.lutece.plugins</groupId> <artifactId>plugin-document</artifactId> <version>1.9.0</version> <type>lutece-plugin</type> </dependency> ... </dependencies> ...