Why does HashMap.java  use transient  for  the collection of key and value?

I just took a look at source code of HashMap.java.
It uses the variable "table" to store the keys and values.
This vairalbe is transient, but any hashmap can be serialized and deserialized.
Could you please help me clarify how it could happen that the transient variable can be serialized?

The 'table' might be transient, but its content, or current data content of the map, shoud be somehow saved/restored in the serializing/deserializing code of the HashMap.

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