setExtent        1204 Source/core/editing/FrameSelection.cpp void FrameSelection::setExtent(const VisiblePosition &pos, EUserTriggered userTriggered)
setExtent         166 Source/core/editing/VisibleSelection.cpp void VisibleSelection::setExtent(const Position& position)
setExtent         175 Source/core/editing/VisibleSelection.cpp void VisibleSelection::setExtent(const VisiblePosition& visiblePosition)