syntax_data: {"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:             } else if let Some(src) = local_begin.sf.external_src.read().get_source() {
context_before:                 extract_source(src, start_index, end_index)
context_after:                 extract_source(src, start_index, end_index)