How to translate the namespace of AS3 to haxe?

Question

I want to translate AS3 code to haxe using AS3HX toolkit, but AS3HX doesn't know how to do that. Whether somebody can tell me how to deal with it?

namespace mx_internal;
using namespace mx_internal;

public myfun():void
{
   mx_internal::setDocumentDescriptor();
}

mx_internal setDocumentDescriptor():void
{
   ...
   ...    
}

private setDocumentDescriptor():void
{
  ...
  ...
}