pub fn diff_code(
left_obj: &ObjInfo,
right_obj: &ObjInfo,
left_out: &ProcessCodeResult,
right_out: &ProcessCodeResult,
left_symbol_ref: SymbolRef,
right_symbol_ref: SymbolRef,
config: &DiffObjConfig,
) -> Result<(ObjSymbolDiff, ObjSymbolDiff)>