ancestorToRetainStructureAndAppearanceForBlock  448 Source/core/editing/markup.cpp     return ancestorToRetainStructureAndAppearanceForBlock(enclosingBlock(commonAncestor));
ancestorToRetainStructureAndAppearanceForBlock  454 Source/core/editing/markup.cpp     return ancestorToRetainStructureAndAppearanceForBlock(commonAncestorBlock);