Function obj_doc_update 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn obj_doc_update(
    txn: *mut obj_write_txn_t,
    collection: *const c_char,
    id: u64,
    payload: *const u8,
    payload_len: usize,
) -> obj_error_t

Update the document at id in collection with payload. Returns OBJ_ERR_NOT_FOUND if the id is absent.

Safety

As obj_doc_insert plus: id must have been returned by a prior obj_doc_insert against the same collection.