syntax_data: {"ast_node_type":"import","tokens":[{"end":66,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// name!  In particular, the new value `W` must use all **the
context_before:     /// **WARNING:** This function is very easy to mis-use, hence the
context_after:     /// same type/region variables** in **precisely the same order**