syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// That is, some values may be passed in register and some on the stack.
context_before:     /// Pass using one or more values of the given type, without requiring them to be consecutive.
context_after:     pub fn new(unit: Reg, total: Size) -> Self {