// two packages, last segment must be same name
// two Plugin classes in both packages, the classes must be the same name
// package lampion.eclipse
// Plugin.scala
package lampion.eclipse;
trait IProject
trait Plugin {
  type Project <: ProjectImpl
  trait ProjectImpl {
    def self : Project
    def xxx : Unit
  }
  val projects = new scala.collection.jcl.LinkedHashMap[IProject,Project]
}
// Nature.scala
package lampion.eclipse;
abstract class Nature {
  def plugin : Plugin
  def getProject : IProject
  def configure = {
    val plugin = this.plugin
    val project = plugin.projects(getProject)
    project.xxx
    ()
  }
}
// package scala.tools.eclipse
// Plugin.scala
package scala.tools.eclipse;
trait Plugin extends lampion.eclipse.Plugin {
  type Project <: ProjectImpl
  trait ProjectImpl extends super.ProjectImpl {
    def self : Project
    def yyy : Unit
  }
}
// Nature.scala
package scala.tools.eclipse;
abstract class Nature extends lampion.eclipse.Nature {
  override def plugin : Plugin
  override def configure = {
    super.configure
    val plugin = this.plugin
    val project = plugin.projects(getProject)
    project.yyy
    ()
  }
}