syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///   for 64-bit integers with a total size of 20 bytes. When the argument is actually passed,
context_before:     /// * if `unit.kind` is `Integer`, the last element can be shorter, i.e., `{ i64, i64, i32 }`
context_after:     ///   this size will be rounded up to the nearest multiple of `unit.size`.