+ ${devel_api_src_dir}/text/spans/character-spacing-span.cpp
+ ${devel_api_src_dir}/text/spans/font-span.cpp
+ ${devel_api_src_dir}/text/spans/underline-span.cpp
+ ${devel_api_src_dir}/text/spans/bold-span.cpp
+ ${devel_api_src_dir}/text/spans/italic-span.cpp
+ ${devel_api_src_dir}/text/spans/background-color-span.cpp