+ ${toolkit_src_dir}/text/rendering/styles/underline-helper-functions.cpp
+ ${toolkit_src_dir}/text/rendering/styles/strikethrough-helper-functions.cpp
+ ${toolkit_src_dir}/text/rendering/styles/character-spacing-helper-functions.cpp
+ ${toolkit_src_dir}/transition/fade-transition-impl.cpp
+ ${toolkit_src_dir}/transition/slide-transition-impl.cpp
+ ${toolkit_src_dir}/transition/scale-transition-impl.cpp