Dereference of a possibly null reference.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'typeSymbol' in 'string ReactiveCommandGenerator.GeneratePartialForCommands(Compilation compilation, INamedTypeSymbol typeSymbol, List<IMethodSymbol> methods)'.

Argument of type 'List<IMethodSymbol?>' cannot be used for parameter 'methods' of type 'List<IMethodSymbol>' in 'string ReactiveCommandGenerator.GeneratePartialForCommands(Compilation compilation, INamedTypeSymbol typeSymbol, List<IMethodSymbol> methods)' due to differences in the nullability of reference types.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'key' in 'bool Dictionary<ClassDeclarationSyntax, SyntaxNode>.TryGetValue(ClassDeclarationSyntax key, out SyntaxNode value)'.

Possible null reference argument for parameter 'name' in 'ImmutableArray<ISymbol> INamespaceOrTypeSymbol.GetMembers(string name)'.

Possible null reference return.

Cannot convert null literal to non-nullable reference type.