private static SQLPrivTypeGrant[] arr(SQLPrivTypeGrant... grantList) {
    return grantList;
  }
Convenience method so that creation of this array in PrivRequirement constructor
is not too verbose

@param grantList
@return grantList
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/sqlstd/Operation2Privilege.java