code: def copy(new_folder)
        new_folder = new_folder.id if new_folder.kind_of?(GenericFolder)
        copy_opts = {
          :to_folder_id => {:id => new_folder},
          :item_ids => [{:item_id => {:id => self.id}}]
        }
        resp = @ews.copy_item(copy_opts)
        rmsg = resp.response_messages[0]
  
        if rmsg.success?
          obj = rmsg.items.first
          itype = obj.keys.first
          obj[itype][:elems][0][:item_id][:attribs][:id]
        else
          raise EwsError, "Could not copy item. #{rmsg.response_code}: #{rmsg.message_text}"
        end
      end
docs: Copy this item to a new folder
   @param [String,Symbol,GenericFolder] new_folder The new folder to move it to. This should
     be a subclass of GenericFolder, a DistinguishedFolderId (must me a Symbol) or a FolderId (String)
   @return [String] the new Id of the copied item