syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"self,"}]}
source_snippet:     self, CoverageLevel, CoverageOptions, CrateType, DebugInfo, ErrorOutputType, FunctionReturn,
context_before: use crate::config::{
context_after:     Input, InstrumentCoverage, OptLevel, OutFileName, OutputType, RemapPathScopeComponents,