Method delegate

gson/src/main/java/com/google/gson/internal/Excluder.java:146–154

()

      }

      private TypeAdapter<T> delegate() {
        // A race might lead to `delegate` being assigned by multiple threads but the last
        // assignment will stick
        TypeAdapter<T> d = delegate;
        if (d == null) {
          d = delegate = gson.getDelegateAdapter(Excluder.this, type);
        }
        return d;
      }
    };
  }