code: public void queueScanTreeAndTypeAnnotate(JCTree tree, Env<AttrContext> env, Symbol sym,
              DiagnosticPosition deferPos)
      {
          Assert.checkNonNull(sym);
          normal(() -> tree.accept(new TypeAnnotate(env, sym, deferPos)));
      }
docs: Enqueue tree for scanning of type annotations, attaching to the Symbol sym.