Return a class instance as a pointer

[Timo Westkämper]

I am trying to compile the following code in D

void* instantiate(_LV2_Descriptor* descriptor,
  double sample_rate, char * bundle_path,
  LV2_Feature** features) {
  Plugin plugin = new Bleep(sample_rate, features);
  return &plugin;
}
but I get the following error

../src/lv2/plugin.d(38): Error: escaping reference to local plugin

What is the right way to create a class instance and a return it 
as a pointer? Also in such a way that it is not claimed by GC. 
There is another callback for object deletion.