Function instruction_context 

fn instruction_context(
    element: &SourceElement,
    build_sources: &HashMap<u32, Arc<SourceData>>,
    used_sources: &mut BTreeSet<u32>,
) -> SourceMapContext

The ETHDebug context of one source map element: its source range, if the build has the source, and the invoke or return marker of a jump into or out of a function.