syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"(BackendRepr::ScalarPair(a1,"}]}
source_snippet:                     (BackendRepr::ScalarPair(a1, b1), BackendRepr::ScalarPair(a2, b2)) => {
context_before:                     (BackendRepr::Scalar(s1), BackendRepr::Scalar(s2)) => scalar_coherent(s1, s2),
context_after:                         scalar_coherent(a1, a2) && scalar_coherent(b1, b2)