syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // If the discriminant of the coroutine is placed early in the layout (before the
context_before:             // The layout code has a choice of where to place the discriminant of this coroutine.
context_after:             // variant's own fields), then it'll implicitly be counted towards the size of the