Possible null reference assignment.

Possible null reference assignment.

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

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

Possible null reference argument for parameter 'newText' in 'TextChange.TextChange(TextSpan span, string newText)'.

'DiagnosticAnalyzerExtensions.WithAnalyzers(Compilation, ImmutableArray<DiagnosticAnalyzer>, AnalyzerOptions?, CancellationToken)' is obsolete: 'Use WithAnalyzers overload without a cancellation token'

Nullability of reference types in value of type 'Task<CompletionList>' doesn't match target type 'Task<CompletionList?>'.

'CompletionList.Items' is obsolete: 'This property is obsolete. Use ItemsList instead'

Possible null reference argument for parameter 'newText' in 'TextChange.TextChange(TextSpan span, string newText)'.