syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // return type is `!`. For the unit type, we need to actually return the unit, but in
context_before:             // This return type is usually `()`, unless the block is diverging, in which case the
context_after:             // the case of `!`, no return value is required, as the block will never return.