src/trio/_channel.py:(158:12 - 158:23): Cannot determine type of "_closed" [has-type]

src/trio/_channel.py:(226:12 - 226:23): Cannot determine type of "_closed" [has-type]

src/trio/_channel.py:(254:12 - 254:23): Cannot determine type of "_closed" [has-type]

src/trio/_channel.py:461: Unused "type: ignore" comment [unused-ignore]

src/trio/_channel.py:472: Unused "type: ignore" comment [unused-ignore]

src/trio/_channel.py:488: Unused "type: ignore" comment [unused-ignore]

src/trio/_tests/test_highlevel_serve_listeners.py:(45:15 - 45:46): "Tuple[MemorySendChannel[StapledStream[MemorySendStream, MemoryReceiveStream]], MemoryReceiveChannel[StapledStream[MemorySendStream, MemoryReceiveStream]]]" has no attribute "send_channel" [attr-defined]

src/trio/_tests/test_highlevel_serve_listeners.py:(53:24 - 53:58): "Tuple[MemorySendChannel[StapledStream[MemorySendStream, MemoryReceiveStream]], MemoryReceiveChannel[StapledStream[MemorySendStream, MemoryReceiveStream]]]" has no attribute "receive_channel" [attr-defined]

src/trio/_tests/test_highlevel_serve_listeners.py:(55:9 - 55:21): Returning Any from function declared to return "StapledStream[MemorySendStream, MemoryReceiveStream]" [no-any-return]

src/trio/_tests/test_channel.py:(414:1 - 416:58): Function is missing a return type annotation [no-untyped-def]

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