CodeQL library for C#
codeql/csharp-all 0.6.1 ( changelog , source )
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Member predicate LocalVariableDeclExpr :: getVariable

Gets the local variable being declared, if any. The only case where no variable is declared is when a discard symbol is used, for example

if (int.TryParse(s, out var _))
    ...
LocalVariable getVariable ( )