$(internal_src_dir)/event/common/property-conditions-impl.cpp \
$(internal_src_dir)/event/common/property-notification-impl.cpp \
$(internal_src_dir)/event/common/property-notification-manager.cpp \
+ $(internal_src_dir)/event/common/property-helper.cpp \
$(internal_src_dir)/event/common/stage-impl.cpp \
$(internal_src_dir)/event/common/system-overlay-impl.cpp \
$(internal_src_dir)/event/common/thread-local-storage.cpp \