syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"self.tlib_path.files.retain(allowed_prefixes);"}]}
source_snippet:         self.tlib_path.files.retain(allowed_prefixes);
context_before:             .for_each(|search_paths| search_paths.files.retain(allowed_prefixes));