cef_display_handler_t.on_loading_progress_change

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_display_handler_t
extern (System) @nogc nothrow
void function(cef_display_handler_t*, cef_browser_t*, double) on_loading_progress_change;

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