# File lib/stomp/connection.rb, line 257 def nack(message_id, headers = {}) raise Stomp::Error::NoCurrentConnection if closed? raise Stomp::Error::UnsupportedProtocolError if @protocol == Stomp::SPL_10 raise Stomp::Error::MessageIDRequiredError if message_id.nil? || message_id == "" headers = headers.symbolize_keys headers['message-id''message-id'] = message_id raise Stomp::Error::SubscriptionRequiredError unless headers[:subscription] _headerCheck(headers) transmit(Stomp::CMD_NACK, headers) end