code: def _handle_union(self, node, scope, ctxt, stream):
          
          self._dlog("handling union")
  
          union_cls = StructUnionDef("union", self, node)
          return union_cls
docs: TODO: Docstring for _handle_union.
  
          :node: TODO
          :scope: TODO
          :ctxt: TODO
          :stream: TODO
          :returns: TODO