syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // avoid heap allocations.
context_before: // The TypeWalker's stack is hot enough that it's worth going to some effort to
context_after: type TypeWalkerStack<I> = SmallVec<[<I as Interner>::GenericArg; 8]>;