syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"0"}]}
source_snippet:             0 => TargetTuple::TargetTuple(d.read_str().to_owned()),
context_before:         match d.read_u8() {
context_after:             1 => TargetTuple::TargetJson {