A closing brace should not be preceded by a blank line. (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1508.md)

Type 'ImmutableObjectBuilder' can be sealed because it has no subtypes in its containing assembly and is not externally visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1852)

A closing brace should not be preceded by a blank line. (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1508.md)

Type 'ImmutableObjectBuilder' can be sealed because it has no subtypes in its containing assembly and is not externally visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1852)