syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// set on a null pointer, but all non-null pointers must be dereferenceable).
context_before:     /// (corresponding to LLVM's dereferenceable_or_null attributes, i.e., it is okay for this to be
context_after:     pub pointee_size: Size,