Argument of type "_SpecialForm" cannot be assigned to parameter "class_or_tuple" of type "_ClassInfo" in function "isinstance"   Type "_SpecialForm" is incompatible with type "_ClassInfo"     "_SpecialForm" is incompatible with "type"     "_SpecialForm" is incompatible with "UnionType"     "_SpecialForm" is incompatible with "tuple[_ClassInfo, ...]" (reportArgumentType)

Type of "message" is partially unknown   Type of "message" is "Message | Unknown" (reportUnknownVariableType)

Type of "fetch_message" is partially unknown   Type of "fetch_message" is "((id: int, /) -> Coroutine[Any, Any, Message]) | Unknown" (reportUnknownMemberType)

Cannot access attribute "fetch_message" for class "PrivateChannel"   Attribute "fetch_message" is unknown (reportAttributeAccessIssue)

Type of "author" is partially unknown   Type of "author" is "User | Member | Unknown" (reportUnknownMemberType)

Type of "mention" is partially unknown   Type of "mention" is "str | Unknown" (reportUnknownMemberType)

Type of "content" is partially unknown   Type of "content" is "str | Unknown" (reportUnknownMemberType)

Type of "author" is partially unknown   Type of "author" is "User | Member | Unknown" (reportUnknownMemberType)

Argument type is partially unknown   Argument corresponds to parameter "object" in function "__new__"   Argument type is "User | Member | Unknown" (reportUnknownArgumentType)

Type of "author" is partially unknown   Type of "author" is "User | Member | Unknown" (reportUnknownMemberType)