pub const ReferenceTrace = struct
pub const ReferenceTrace = struct {
/// null terminated string index
/// Except for the sentinel ReferenceTrace element, in which case:
/// * 0 means remaining references hidden
/// * >0 means N references hidden
decl_name: String,
/// Index into extra of a SourceLocation
/// If this is 0, this is the sentinel ReferenceTrace element.
src_loc: SourceLocationIndex,
}