about object introspection for dbus

[Edison_lin-林俊翰]

Hi,
I've seen these words on one of the posts in the mailinglist, 
"If you are hand-rolling your own C API, remember you also need to implement object introspection.
Havoc". 
I'm wondering how to implement the object introspection ? What's the object introspection do for ? If this is a stupid question please kindly forgive me.

Appreciate,
Edison Lin
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