Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Nullability of reference types in type of parameter 'other' doesn't match implemented member 'bool IEquatable<CypherTypeItem>.Equals(CypherTypeItem? other)' (possibly because of nullability attributes).

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

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