成员的完整列表，这些成员属于 MQTTAsync_disconnectOptions,包括所有继承而来的类成员

context	MQTTAsync_disconnectOptions
onFailure	MQTTAsync_disconnectOptions
onFailure5	MQTTAsync_disconnectOptions
onSuccess	MQTTAsync_disconnectOptions
onSuccess5	MQTTAsync_disconnectOptions
properties	MQTTAsync_disconnectOptions
reasonCode	MQTTAsync_disconnectOptions
struct_id	MQTTAsync_disconnectOptions
struct_version	MQTTAsync_disconnectOptions
timeout	MQTTAsync_disconnectOptions