code: def forward(opts = {})
        msg = Template::ForwardItem.new opts.clone
        yield msg if block_given?
        msg.reference_item_id = {id: self.id, change_key: self.change_key}
        dispatch_create_item! msg
      end
docs: If you want to add to the body set #new_body_content. If you set #body
   it will override the body that is there.
   @see MessageAccessors#send_message for options
     additional options:
       :new_body_content, :new_body_type
   @example
     item.forward do |i|
       i.new_body_content = "Add this to the top"
       i.to_recipients << 'test@example.com'
     end