syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Use a single `xlen` int if possible, 2 * `xlen` if 2 * `xlen` alignment
context_after:         // is required, and a 2-element `xlen` array if only `xlen` alignment is