[ Version ( since = "2.38" ) ]
public int get_instance_private_offset ()
Gets the offset of the private data for instances of this.
This is how many bytes you should add to the instance pointer of a class in order to get the private data for the type represented by this.
You can only call this function after you have registered a private data area for this using add_private.
| this |
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the offset, in bytes |