syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"Spanned"}]}
source_snippet:                             Spanned { node: Operand::Move(size), span: DUMMY_SP },
context_before:                         args: [
context_after:                             Spanned { node: Operand::Move(align), span: DUMMY_SP },