When generating signed Android Apk with HelpStack proguard is showing warnings about android.util.FloatMath methods

[BhargaviDeviYamanuri]

After integrating HelpStack following warnings are coming
Warning:com.polites.android.MathUtils: can't find referenced method 'float sqrt(float)' in library class android.util.FloatMath.
Before integration there is no problem with proguard , i try to write some rules for HelpStack but doesn't work.

Need progurad rules for HelpStack.

[BhargaviDeviYamanuri]

-dontwarn com.polites.android.MathUtils**
-dontwarn com.polites.android.VectorF**

Finally i get solution for this warnings,i am posting hear if it may will help others.