public BottomNavigationItem setInactiveIcon(Drawable mInactiveIcon) {
        if (mInactiveIcon != null) {
            this.mInactiveIcon = mInactiveIcon;
            inActiveIconAvailable = true;
        }
        return this;
    }
By default library will switch the color of icon provided (in between active and in-active icons)
This method is used, if people need to set different icons for active and in-active modes.

@param mInactiveIcon in-active drawable icon
@return this, to allow builder pattern
common/src/main/java/com/sxjs/common/widget/bottomnavigation/BottomNavigationItem.java