+ ${toolkit_src_dir}/text/spannable/spans/character-spacing-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/strikethrough-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/font-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/underline-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/bold-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/italic-span-impl.cpp
+ ${toolkit_src_dir}/text/spannable/spans/background-color-span-impl.cpp