+ ${toolkit_src_dir}/particle-system/particle-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-domain-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-emitter-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-list-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-modifier-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-renderer-impl.cpp
+ ${toolkit_src_dir}/particle-system/particle-source-impl.cpp