syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"("}]}
source_snippet:             (
context_before:             (PassMode::Pair(a1, b1), PassMode::Pair(a2, b2)) => a1.eq_abi(a2) && b1.eq_abi(b2),
context_after:                 PassMode::Cast { cast: c1, pad_i32: pad1 },