-renamesourcefileattribute SourceFile

# Preserve all Dexter classes and method names

-keepattributes InnerClasses, Signature, *Annotation*

-keep class com.karumi.dexter.** { *; }
-keep interface com.karumi.dexter.** { *; }
-keepclasseswithmembernames class com.karumi.dexter.** { *; }
-keepclasseswithmembernames interface com.karumi.dexter.** { *; }