@return whether or not the message is durable. @see <a href="http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-header">AMQP specification</a>
See Implementation
@return whether or not the message is durable. @see <a href="http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-header">AMQP specification</a>