private boolean isInPool(T instance) {
      for (int i = 0; i < mPoolSize; i++) {
        if (mPool[i] == instance) {
          return true;
        }
      }
      return false;
    }
Creates a new instance.

@param maxPoolSize The max pool size.
@throws IllegalArgumentException If the max pool size is less than zero.
systemlib/src/main/java/android/util/Pools.java