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Lines Matching refs:vto

2302             final ViewTreeObserver vto = anchor.getViewTreeObserver();
2303             vto.removeOnScrollChangedListener(mOnScrollChangedListener);
2322         final ViewTreeObserver vto = anchor.getViewTreeObserver();
2323         if (vto != null) {
2324             vto.addOnScrollChangedListener(mOnScrollChangedListener);