public object CreateExpression_and_CompileFast() =>
 LightExpressionTests.CreateComplexExpression().CompileFast();
 public object CreateLightExpression_and_CompileFast() =>
 LE.CompileFast(LightExpressionTests.CreateComplexLightExpression());
 public object CreateLightExpression() =>
 LightExpressionTests.CreateComplexLightExpression();