XCB_EWMH_WM_STATE_ADD

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
alias XCB_EWMH_WM_STATE_ADD = xcb_ewmh_wm_state_action_t.XCB_EWMH_WM_STATE_ADD

Meta