224     use alloc::boxed::Box;
226     unsafe impl<'a, T, F> UnsafeFutureObj<'a, T> for Box<F>  implementation
230             Box::into_raw(self)  in into_raw()
234             drop(Box::from_raw(ptr as *mut F))  in drop()
238     unsafe impl<'a, T: 'a> UnsafeFutureObj<'a, T> for Box<dyn Future<Output = T> + 'a> {  implementation
240             Box::into_raw(self)  in into_raw()
244             drop(Box::from_raw(ptr))  in drop()
248     unsafe impl<'a, T: 'a> UnsafeFutureObj<'a, T> for Box<dyn Future<Output = T> + Send + 'a> {  implementation
250             Box::into_raw(self)  in into_raw()
254             drop(Box::from_raw(ptr))  in drop()
258     unsafe impl<'a, T, F> UnsafeFutureObj<'a, T> for Pin<Box<F>>
269             drop(Pin::from(Box::from_raw(ptr)))  in drop()
273     unsafe impl<'a, T: 'a> UnsafeFutureObj<'a, T> for Pin<Box<dyn Future<Output = T> + 'a>> {
281             drop(Pin::from(Box::from_raw(ptr)))  in drop()
285     unsafe impl<'a, T: 'a> UnsafeFutureObj<'a, T> for Pin<Box<dyn Future<Output = T> + Send + 'a>> {
293             drop(Pin::from(Box::from_raw(ptr)))  in drop()
297     impl<'a, F: Future<Output = ()> + Send + 'a> From<Box<F>> for FutureObj<'a, ()> {
298         fn from(boxed: Box<F>) -> Self {  in from()
303     impl<'a> From<Box<dyn Future<Output = ()> + Send + 'a>> for FutureObj<'a, ()> {
304         fn from(boxed: Box<dyn Future<Output = ()> + Send + 'a>) -> Self {  in from()
309     impl<'a, F: Future<Output = ()> + Send + 'a> From<Pin<Box<F>>> for FutureObj<'a, ()> {
310         fn from(boxed: Pin<Box<F>>) -> Self {  in from()
315     impl<'a> From<Pin<Box<dyn Future<Output = ()> + Send + 'a>>> for FutureObj<'a, ()> {
316         fn from(boxed: Pin<Box<dyn Future<Output = ()> + Send + 'a>>) -> Self {  in from()
321     impl<'a, F: Future<Output = ()> + 'a> From<Box<F>> for LocalFutureObj<'a, ()> {
322         fn from(boxed: Box<F>) -> Self {  in from()
327     impl<'a> From<Box<dyn Future<Output = ()> + 'a>> for LocalFutureObj<'a, ()> {
328         fn from(boxed: Box<dyn Future<Output = ()> + 'a>) -> Self {  in from()
333     impl<'a, F: Future<Output = ()> + 'a> From<Pin<Box<F>>> for LocalFutureObj<'a, ()> {
334         fn from(boxed: Pin<Box<F>>) -> Self {  in from()
339     impl<'a> From<Pin<Box<dyn Future<Output = ()> + 'a>>> for LocalFutureObj<'a, ()> {
340         fn from(boxed: Pin<Box<dyn Future<Output = ()> + 'a>>) -> Self {  in from()