uncheckedPreviousOffsetForBackwardDeletion  321 Source/core/dom/Position.cpp             return createLegacyEditingPosition(node, uncheckedPreviousOffsetForBackwardDeletion(node, offset));
uncheckedPreviousOffsetForBackwardDeletion  156 Source/core/dom/Position.h     static int uncheckedPreviousOffsetForBackwardDeletion(const Node*, int current);