xcb_ewmh_set_wm_user_time_window

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
xcb_void_cookie_t
xcb_ewmh_set_wm_user_time_window
(,
xcb_window_t window
,
uint xtime
)

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