syntax_data: {"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let referent_align = layout.align.abi.bytes_usize();
context_before:                     let layout = layout_of(cx, *ty)?;
context_after:                     let referent_size = layout.size.bytes_usize();