Gui/APIv0.2.12Gui:on_destroyConnects a callback to widget destruction.SignaturerecurloopCopyGui:on_destroy(u8*, fn(u8*,u8*)->void abi sysv-amd64, u8*) -> u64Previous← Gui:on_click:(u8*,fn(u8*,u8*)->void abi sysv-amd64,u8*)NextGui:on_destroy:(u8*,fn(u8*,u8*)->void abi sysv-amd64,u8*) →