question: public void addReturnHotspot ( String signature ) { List < ValueBox > sigSpots = StringAnalysis . getReturnExpressions ( signature ) ; logger . debug ( "For signature " + signature + " got " + sigSpots . size ( ) + " hotspots." ) ; if ( ! sigSpots . isEmpty ( ) ) { addSignatureToHotspotMap ( signature , new Hotspot ( signature , sigSpots ) ) ; hotspots . addAll ( sigSpots ) ; } }
target:  Add a hotspot for methods that return a sting.