Cannot convert null literal to non-nullable reference type.

Nullability of reference types in type of parameter 'x' of 'bool ByteArrayComparer.Equals(byte[] x, byte[] y)' doesn't match implicitly implemented member 'bool IEqualityComparer<byte[]>.Equals(byte[]? x, byte[]? y)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'y' of 'bool ByteArrayComparer.Equals(byte[] x, byte[] y)' doesn't match implicitly implemented member 'bool IEqualityComparer<byte[]>.Equals(byte[]? x, byte[]? y)' (possibly because of nullability attributes).

Non-nullable property 'content' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'type' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'dropout' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'unk_token' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'continuing_subword_prefix' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'end_of_word_suffix' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.