22 pub struct VMExnRef(VMGcRef);  struct
24 impl fmt::Pointer for VMExnRef {  implementation
30 impl From<VMExnRef> for VMGcRef {
32     fn from(x: VMExnRef) -> Self {  in from()
52     pub fn into_exnref(self, gc_heap: &(impl GcHeap + ?Sized)) -> Result<VMExnRef, VMGcRef> {  in into_exnref()  argument
68     pub fn into_exnref_unchecked(self) -> VMExnRef {  in into_exnref_unchecked()  argument
70         VMExnRef(self)  in into_exnref_unchecked()
75     pub fn as_exnref(&self, gc_heap: &(impl GcHeap + ?Sized)) -> Option<&VMExnRef> {  in as_exnref()  argument
88     pub fn as_exnref_unchecked(&self) -> &VMExnRef {  in as_exnref_unchecked()  argument
92         assert!(matches!(ret, VMExnRef(VMGcRef { .. })));  in as_exnref_unchecked()
97 impl VMExnRef {  implementation