ForeachStatement.EmbeddedStatement doesn't return null, but it might return Statement.Null.
Try to fix NullReferenceException in UnreachableCodeIssue.
Try to fix InvalidCastException in CreateOverloadWithoutParameterAction
ILSpySymbolSource.GetLocalVariables: in case of error, return an empty collection instead of null
XmlDocumentationElement: return null if given a null entity