syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // In the common case, all bindings will be in leaves. Allocate to fit the leaf's bindings.
context_before: ) -> Vec<Binding<'tcx>> {
context_after:     let mut all_bindings = Vec::with_capacity(leaf_bindings.len());