syntax_data: {"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let mut crate_types: Vec<CrateType> = Vec::new();
context_before: pub fn parse_crate_types_from_list(list_list: Vec<String>) -> Result<Vec<CrateType>, String> {
context_after:     for unparsed_crate_type in &list_list {