Unable to set Thumb Radius and Thumb Color from XML or Java

[AbdullahUsmani]

Wiki states that : custom:thumbRadius / setThumbRadius(dim) can be used for thumb radius customisation and custom:thumbColorNormal / setThumbColorNormal(int) can be used for thumb colour customisation

But I am unable to set any of these from XML or Java code. I looked into the attrs.xml file in res/values, it doesn't even have these attributes. Neither does the RangeBar class have the stated methods.

[VaibhavOPTIX]

I think that's what custom:selectorSize and custom:selectorColor does, but still we can have the custom:selectorColor accept a drawable