syntax_data: {"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let mut all_bindings = Vec::with_capacity(leaf_bindings.len());
context_before:     // In the common case, all bindings will be in leaves. Allocate to fit the leaf's bindings.
context_after:     let mut remainder = parents