MyCSS_PROPERTY_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
enum MyCSS_PROPERTY_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT = mycss_property_transition_timing_function.MyCSS_PROPERTY_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT;

Meta