call out event API for components
call out event API for components

gbiggs/design,ros2/design,gbiggs/design,Po-Jen/design,ros2/design,Po-Jen/design,Po-Jen/design,Po-Jen/design,ros2/design,ros2/design,ros2/design,gbiggs/design,Po-Jen/design,gbiggs/design,gbiggs/design