public void setPtrIndicator(PtrIndicator slider) {
        if (mPtrIndicator != null && mPtrIndicator != slider) {
            slider.convertFrom(mPtrIndicator);
        }
        mPtrIndicator = slider;
    }
Not necessary any longer. Once moved, cancel event will be sent to child.

@param yes
ptr-lib/src/in/srain/cube/views/ptr/PtrFrameLayout.java