Since we need to allow it (at the least) inside `drain_until_final_msg()` for handling stream-phase termination races where we don't want to have to handle a raised error from something like `Context.result()`. Expose the passthrough option via a `passthrough_non_pld_msgs: bool` kwarg. Add comprehensive comment to `current_pldrx()`.  | 
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| .. | ||
| __init__.py | ||
| _codec.py | ||
| _ops.py | ||
| pretty_struct.py | ||
| ptr.py | ||
| types.py | ||