How would I break on "optimization opportunities in xcode/lldb?

I get a suggestion from xcode machinery regarding swapping CAShapeLayer for a CALayer due to a simple shape with rounded corners.

x-xcode-debug-views://7f93b7c5d6b0?DBGViewDebuggerLaunchSessionParameter=7f93b7c5d6b0 A CAShapeLayer is used with a path that's a rect, a rounded-rect, or an ellipse. Instead, use an appropriately transformed plain CALayer with cornerRadius set.

How could I find the offending object for that suggestion? There must be a WWDC session for this ;^)