Method Builder

api/src/main/java/io/grpc/Attributes.java:222–225

(Attributes base)

    private IdentityHashMap<Key<?>, Object> newdata;

    private Builder(Attributes base) {
      assert base != null;
      this.base = base;
    }

    private IdentityHashMap<Key<?>, Object> data(int size) {
      if (newdata == null) {