When copying artifacts from a Maven project: if you type the bare Jenkins project name (i.e. "my-build-trunk") into the "Project Name" field then Jenkins will display the message:
"Artifacts will be copied from all modules of this Maven project; click the help icon to learn about selecting a particular module."
At this point, a reasonable user would expect to be able to configure a Maven module instead, e.g. "my-build-trunk/com.stuff.my$moduleName".
However, the TriggeredBuildSelector does not understand Maven project names because it is only expecting a bare Jenkins project name. This creates such frustration and confusion that users are forced to examine the plugin's source code to find out WHAT ON EARTH is going wrong.