Method smear

corpus/java/training/guava/collect/Hashing.java:46–48

(int hashCode)

   * hereby disclaims copyright to this source code.
   */
  static int smear(int hashCode) {
    return C2 * Integer.rotateLeft(hashCode * C1, 15);
  }

  static int smearedHash(@Nullable Object o) {
    return smear((o == null) ? 0 : o.hashCode());