setBase          1198 Source/core/editing/FrameSelection.cpp void FrameSelection::setBase(const VisiblePosition &pos, EUserTriggered userTriggered)
setBase           148 Source/core/editing/VisibleSelection.cpp void VisibleSelection::setBase(const Position& position)
setBase           157 Source/core/editing/VisibleSelection.cpp void VisibleSelection::setBase(const VisiblePosition& visiblePosition)