cef_print_settings_t.set_duplex_mode

Undocumented in source but is binding to an external library. You might be able to learn more by searching the web for its name.
struct cef_print_settings_t
extern (System) @nogc nothrow
void function(cef_print_settings_t*, cef_duplex_mode_t mode) set_duplex_mode;

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