I have this test Org file:

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I am working on an exporter back-end, and I need to get the value of the :FOO property

- During *subtree* export (C-c C-e C-s ..)

- In the body filter fn. So I have only info and body at my access.

I looked at ox-html.el for hints but that didn't help. In there too, the CUSTOM_ID property drawer (picked one example I knew) is not parsed during subtreep export.

How can I do this?

Thanks.