syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // so can't always be moved out.
context_before:             // For let guards inside a match, prefixes might use bindings of the match pattern,
context_after:             // For `else if let`, an extra indentation level would be required to move the bindings.