public void clearSelections() {
        for (CheckableViewHolder vh : mCheckedVisibleViewHolders) {
            vh.checkbox.setChecked(false);
        }
        mCheckedVisibleViewHolders.clear();
        mCheckedItems.clear();
    }
Animate de-selection of visible views and clear
selected set.
android/modules/module_filepicker/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java