syntax_data: {"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if let [ty, ..] = &***args
context_before:             ["hashbrown", "raw", "RawTable" | "RawIntoIter"] => {
context_after:                     && let Some(ty) = ty.as_type()