code: def _compiler_plugins_cp_entries(self):
      
      java_options_src = Java.global_instance()
      scala_options_src = ScalaPlatform.global_instance()
  
      def cp(instance, toolname):
        scope = instance.options_scope
        return instance.tool_classpath_from_products(self._products, toolname, scope=scope)
      classpaths = (cp(java_options_src, 'javac-plugin-dep') +
                    cp(scala_options_src, 'scalac-plugin-dep'))
      return [(conf, ClasspathEntry(jar)) for conf in self.DEFAULT_CONFS for jar in classpaths]
docs: Any additional global compiletime classpath entries for compiler plugins.