fn_ctx_get_ref() cannot be used on the Initial Context. fn_ctx_get_ref() can be used on contexts bound in the Initial Context (in other words, the bindings in
the Initial Context have references).
If the context handle was created earlier using the fn_ctx_handle_from_ref() operation, the reference returned by the fn_ctx_get_ref() operation may not necessarily
be exactly the same in content as that originally supplied. For example, fn_ctx_handle_from_ref() may construct the context handle from one address from the list of addresses. The context
implementation may return with a call to fn_ctx_get_ref() only that address, or a more complete list of addresses than what was supplied in fn_ctx_handle_from_ref().
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