public void onClickCheckable(@NonNull View view, @NonNull CheckableViewHolder viewHolder) {
        if (isDir(viewHolder.file)) {
            goToDir(viewHolder.file);
        } else {
            onLongClickCheckable(view, viewHolder);
            if (singleClick) {
                onClickOk(view);
            }
        }
    }
Called when a selectable item is clicked. This might be either a file or a directory.

@param view       that was clicked. Not used in default implementation.
@param viewHolder for the clicked view
android/modules/module_filepicker/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java