syntax_data: {"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let op = if variable_length { BinOp::Ge } else { BinOp::Eq };
context_before:             TestCase::Slice { len, variable_length } => {
context_after:                 TestKind::Len { len: len as u64, op }