syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"Rvalue::NullaryOp(NullOp::SizeOf,"}]}
source_snippet:                     Rvalue::NullaryOp(NullOp::SizeOf, value_ty),
context_before:                     size,
context_after:                 );