syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":".with_note(format!(\"caller"}]}
source_snippet:             .with_note(format!("caller signature: `{caller_sig}`"))
context_before:             .with_note("`become` requires caller and callee to have matching signatures")
context_after:             .with_note(format!("callee signature: `{callee_sig}`"))