Wicketstuff core modules that can be built using java 6.
'org.wicketstuff:googlecharts-parent:6.7.0'
<dependency>
<groupId>org.wicketstuff</groupId>
<artifactId>googlecharts-parent</artifactId>
<version>6.7.0</version>
</dependency>
<dependency org="org.wicketstuff" name="googlecharts-parent" rev="6.7.0"/>
"org.wicketstuff", "googlecharts-parent", "6.7.0"